Designed to improve the performance of bike and rider.
Engineered to deliver the performance attributes most requested by on - and off-track dirt bike riders, including consistent clutch feel. Consistent clutch feel is the result of 'friction durability', so whether deep into a race or deep in the woods, riders can feel confident that their clutch will perform from start to finish. AMSOIL exclusive advanced chemistry provides outstanding engine reliability for worry-free operation under severe conditions.
Product Applications
10W-50 Synthetic Dirt Bike Oil: recommended for KTM®, Kawasaki, Yamaha, Suzuki, Husqvarna and other dirt bikes where 10W-50 motorcycle oil is used. Recommended in place of Motorex® Cross Power 4T.
Product Application Specs
API SG, SJ, SH, SL
JASO MA
Product Description
AMSOIL INC., the premier manufacturer of synthetic motorcycle lubricants, focuses on improving lubricant performance so riders can focus on improving their performance on the trail or the track. That's why AMSOIL is the Official Oil of Monster Energy Supercross, AMSOIL Arenacross, AMSOIL GNCC and the AMA Amateur Nationals.
Delivers Confidence in Clutch Feel: AMSOIL Synthetic Dirt Bike Oil’s superior friction-durability properties help minimize clutch slippage, fade and chatter, giving riders consistent clutch feel during takeoffs or when maneuvering around obstacles on the trail. In an extreme simulated-start test, AMSOIL Synthetic Dirt Bike Oil continued to deliver consistent clutch feel following 32 simulated race starts, while a leading original equipment manufacturer (OEM)-branded oil demonstrated inconsistent clutch-lever action and poor clutch feel after 16 starts.
The clutch plates lubricated with AMSOIL Synthetic Dirt Bike Oil remained clean and in good overall condition, while the plates using the OEM oil revealed discoloration and wear. AMSOIL Synthetic Dirt Bike Oil’s superior performance helps instill in riders the confidence that their bikes will perform consistently in all types of riding conditions.
Protects Against Wear
AMSOIL Synthetic Dirt Bike Oil withstands high-rpm operation, extreme heat and mechanical shear. Its synthetic base oils naturally resist viscosity loss and provide a protective film against wear to gears, bearings and pistons. Its anti-wear additives provide an extra measure of protection, promoting long component life to help riders get the most out of their bikes.
• Delivers confidence in clutch feel
• Superior protection against gear, bearing & piston wear
• Maximizes horsepower
• Helps extend clutch life
RACING IS RESEARCH™
AMSOIL Synthetic Dirt Bike Oil underwent extensive on-track testing in the bikes of AMSOIL-sponsored professional riders on the GEICO/AMSOIL/Honda Factory Connection and Team Babbitt's racing teams. A combination of racer feedback and lab testing allowed AMSOIL to fine-tune AMSOIL Synthetic Dirt Bike Oil for outstanding wear protection and consistent clutch feel — benefits riders demand.
SERVICE LIFE
AMSOIL Synthetic Dirt Bike Oil should be changed according to the vehicle manufacturer's recommendations.
HEALTH & SAFETY
This product is not expected to cause health concerns when used for the intended application and according to the recommendations in the Material Safety Data Sheet (MSDS).
Was running Lucas oil and it's a amsoil rep that lives close to me he told me about the amsoil db50 I tried it and love it run it in my son's Honda 150r and in my Yamaha wr400 the cluch seems to be really smooth superior protection
Item Reviewed: Synthetic SAE 10W-50 Dirt Bike Oil (DB50)
Reviewed by Craig:
I would buy this again
I race dirt bikes and have found this oil to stay cleaner than others after 10 hard racing hours.
Item Reviewed: Dirt Bike Motor Oils
Reviewed by Moto Mike:
Great stuff
I like the performance of this product in my YZ450F. Clutch feels great, motor runs smooth, and with the preferred customer pricing it's the same or better pricing than anything else.
Item Reviewed: Dirt Bike Motor Oils
Reviewed by Robert:
WIll buy again
Been using Amsiol in my racing motorcycles for more than 25 years and love the performance and wear protection it gives.
Item Reviewed: Dirt Bike Motor Oils
Reviewed by Jim:
Kept in stock in my garage
The only oil I use in my bike.
Item Reviewed: Dirt Bike Motor Oils
Reviewed by Cliff:
Each and every thing I own that moves has AMSOIL in or on it
Amazing product
Item Reviewed: Dirt Bike Motor Oils
Reviewed by Willie:
Good dirtbike oil!
I have this in 3 dirt bikes and so far I have no sticking clutch or anything. So I'm convinced it does it's job!
Item Reviewed: Dirt Bike Motor Oils
Reviewed by Bart:
I love my amsoil! Run it in everything.
My regional dealer I get amsoil through is without a doubt the best freaking guy ever! Always resolves any issue I've had imeaditely
Item Reviewed: Dirt Bike Motor Oils
Reviewed by Bob:
Clutch protection
I started to run this oil on my adventure bikes. Needless to say that it does exactly what Amsoil says it does. Best clutch pull and feel, even after several slipper clutching maneuvers in difficult trails.
Item Reviewed: Dirt Bike Motor Oils
Reviewed by Matt:
Great product.
Put this oil in my CR 85. Clutch feel is better and gear changes are smoother.
Item Reviewed: Dirt Bike Motor Oils
Reviewed by Rpm:
Love this stiff
Can't buy better
Item Reviewed: Dirt Bike Motor Oils
Reviewed by Dk:
Pleased
When switching from KTM factory recommended oil I noticed less engine noise and amsoil is not as expensive as the "orange oil". I've not done blackstone tests but I do believe the amsoil is working well for this 350xcf.
Item Reviewed: Dirt Bike Motor Oils
Reviewed by MikeB:
Only the best for my toys
I currently own 4 dirt bikes and a quad and they all use Amsoil now. I've also rebuilt several bikes/quads that I've sold over the years. I've tested most of the major brands and Amsoil shifts so much better than most of the leading motorcycle specific brands! Amsoil is now my #1 with Max... being #2.
Item Reviewed: Dirt Bike Motor Oils
Reviewed by Jimmy:
I will only use Amsoil
I use it in my 2003 Suzuki DRZ 250
Item Reviewed: Dirt Bike Motor Oils
Reviewed by Believer:
I continue to buy this product
Seems to work great and good clutch feel. Great price compared to dealer oil prices.
Item Reviewed: Dirt Bike Motor Oils
Reviewed by MOTODADJLG:
THE ORIGINAL AND THE BEST
I have always used Amsoil in my sons Dirt bikes and we have never had the problems others have like bearings going out or rings seizing up.I do all of our mechanic work and motors using Amsoil don't show wear like other oils.Don't compromise protection use Amsoil.
Item Reviewed: Dirt Bike Motor Oils
Reviewed by The pro lube:
Forever
I use this oil in my dirt bikes and it's awesome it makes my bikes run smooth and the clutch feel is unbeatable it makes it feel super smooth and consistent feel i would definitely recommend it to someone that depends on there engine!!!!!!!!!!!!!!!!!!!!!!!!!!!.......
Item Reviewed: Dirt Bike Motor Oils
Reviewed by Evan:
The best
Use this in my 2017 Benelli TNT 600. Makes it run like a champ!!
Item Reviewed: Dirt Bike Motor Oils
Reviewed by Dave in CO:
This is the best
I use this oil to keep 3 different enduros running strong.
Item Reviewed: Dirt Bike Motor Oils
Reviewed by Dewey:
Works great
Three dirt bikes running strong no clutch slippage great product
Item Reviewed: Dirt Bike Motor Oils
Reviewed by S409:
Best Oil for Desert Racing
Amsoil has never let me down. Unlike other oils, Amsoil has never smelt burnt or looked broken down after any of our long desert races.
Item Reviewed: Dirt Bike Motor Oils
Reviewed by Casey:
Excellent Product!
Use in my son's KX250F dirt bike. Noticeable power increase, clutch feel, smoother running and holds up longer than other oils between changes.
Item Reviewed: Dirt Bike Motor Oils
Reviewed by KTM MX:
Great oil
We use this on our race bike and when we service it still looks clean
Item Reviewed: Dirt Bike Motor Oils
Reviewed by Jet A Racing:
Race oil
When your race counts on superior engine performance there is none better than Amsoil to give you the confidence in your motor.
Item Reviewed: Dirt Bike Motor Oils
Reviewed by Mike:
10-50 dirt bike oil
Never had a oil related failure
Item Reviewed: Dirt Bike Motor Oils
Reviewed by Mike:
Good stuff
This oil runs awesome in my son's kx100.
Item Reviewed: Dirt Bike Motor Oils
Reviewed by Bill:
Great oil
I use it in my 2011 KLR650. My bike shifts better since I switched to AMSOIL and performance is much better overall.
Item Reviewed: Dirt Bike Motor Oils
Reviewed by Dave:
Improved clutch feel
I switched from the traditional Amsoil Motorcycle oil to the Dirt bike specific formula when it came out a few years back. The claims about improved clutch feel were not exaggerated. Considerably better clutch feel in my old YZ250F. Smoother engagement and a better slip zone.
Item Reviewed: Dirt Bike Motor Oils
Reviewed by BMW Rider:
Not just for dirt bikes
I use this in my BMW adventure bike which sees hard use of the clutch in off highway riding to work through tough terrain.
Item Reviewed: Dirt Bike Motor Oils
Reviewed by CAJO:
10/10
Love Amsoil products. Something I can count on always working even when racing is unpredictable.
Item Reviewed: Dirt Bike Motor Oils
Reviewed by Jeff:
Amsoil dirt 10w40
Great product! Use on 4 strokes off road bikes that I service! Great protection, quality & consistency!
Item Reviewed: Dirt Bike Motor Oils
Reviewed by Jordan:
Great product
Quality product
Item Reviewed: Dirt Bike Motor Oils
Reviewed by Bobcat1:
Will buy again!
Use this product in two dirt bikes my son and I ride and race. Will use nothing else but Amsoil!
Item Reviewed: Dirt Bike Motor Oils
Reviewed by E Fryer:
The only oil I use!
Great product that does everything they say. The only oil I run in my dirt bikes. I don't have to rebuild my engines as often due to the quality of Amsoil. Which saves me money in the long run.
Item Reviewed: Dirt Bike Motor Oils
Reviewed by Racerross29:
Flat Track Racer
We have use this oil in all of our race bikes and have never had a oil related failure. Both Vintage 2 strokes and our modern 450cc 4 strokes.
We also use Amsoil in our team hauler.
Item Reviewed: Synthetic SAE 10W-50 Dirt Bike Oil (DB50)
Reviewed by Big Show:
Fantastic Oil
I've used this for years in Harley's and saw the difference in dyno numbers first hand as a Master Technician. Now I'm racing dirt bikes again in the GNCC Series and see the difference in engine wear and clutch performance. I would buy this oil even if I were offered other oil for free!
Item Reviewed: Dirt Bike Motor Oils
Reviewed by Casey Barrett:
Everything AMSOIL makes is awesome!
I use AMSOIL in everything I own without even thinking about it.
Item Reviewed: Synthetic SAE 10W-50 Dirt Bike Oil (DB50)
Reviewed by Jerry D:
Ther is NO BETTER OIL!!!
I use it, from the DIFF. to the grease, for the steering, for my H.D., to my PRO- MASTER VAN, All my vehicles, it don't come any better, Jerry D.
Item Reviewed: Synthetic SAE 10W-50 Dirt Bike Oil (DB50)
Reviewed by Matt:
10w-50
Amsoil is the best and this oil is no exception
Item Reviewed: Synthetic SAE 10W-50 Dirt Bike Oil (DB50)
Reviewed by Jersey Lou:
Smooth
Smooth, crisp shifts on my '17 Husqvarna. Oil at changes is basically still clean. Just another great product.
Item Reviewed: Synthetic SAE 10W-50 Dirt Bike Oil (DB50)
Reviewed by Michel:
Yes
Great
Item Reviewed: Synthetic SAE 10W-50 Dirt Bike Oil (DB50)
Reviewed by Numbskall:
Will continue to purchase
Convenient and quick delivery. Good product at a good price
Item Reviewed: Synthetic SAE 10W-50 Dirt Bike Oil (DB50)
Reviewed by Alex the Rider:
Great Stuff
Wear has been low, clutch feel is great.
Item Reviewed: Synthetic SAE 10W-50 Dirt Bike Oil (DB50)
Reviewed by Cmart:
Great oil
Run this in my 690
Item Reviewed: Synthetic SAE 10W-50 Dirt Bike Oil (DB50)
Reviewed by Superduke:
Best oil you can buy
As most of you already know, Amsoil is the best lubrication money can buy. For my high-performance KTM Superduke 1290R motorcycle, the choice was obvious. Gained 1-2 mpg after install and the peace of mind knowing this oil meets all specifications for my ride are all I need to push this beast to redline over and over again. I use Amsoil lubricants in every vehicle I own. Wife's Lexus IS350, my Land Rover Discovery, lawn tractor, chainsaw, Yamaha scooter
Item Reviewed: Synthetic SAE 10W-50 Dirt Bike Oil (DB50)
Reviewed by Grnlmar Hare scrambler:
Great product
I use the 10w 50 in my 2015 Ktm 250 xcw. I have no problems with it and works great. It works great with my Rekluse clutch set up. It has stood up the rigors of all my 2 hour hare scrambles so I will continue to use it.
Item Reviewed: Synthetic SAE 10W-50 Dirt Bike Oil (DB50)
Reviewed by DM794:
Superior Oil
I use this oil in my 2016 Kawasaki KX 450 and it outperforms all others I've used. I can feel the bike running cooler and the oil lasts longer than other synthetics I've used. Very happy and will use Amsoil for years to come.
Item Reviewed: Synthetic SAE 10W-50 Dirt Bike Oil (DB50)
Reviewed by Motomandan:
I won't purchase anything else.
I use Amsoil Dirt Bike oils in all the dirt bikes I've owned. I race off road XC hare scrambles which generate a lot of heat in today's race 4 striokes and Amsoil gives me 100% piece of mind.
Item Reviewed: Synthetic SAE 10W-50 Dirt Bike Oil (DB50)
Reviewed by None:
Never buy anything else but amsoil!
Use it in all my dirt bikes and it's the best stuff out there!
Item Reviewed: Synthetic SAE 10W-50 Dirt Bike Oil (DB50)
Reviewed by Orangebrigade:
Dirt synthetic oil
Have been running this in my ktm past two race seasons best oil out there hands down
Item Reviewed: Synthetic SAE 10W-50 Dirt Bike Oil (DB50)
Reviewed by Rustdoc:
Performance Plus
The KLR 650 came alive after I put this in it. I had to clutch it to pull the front wheel. Now I just big on the gas and it will pull it freely. Seems like tons more torque and smoother engine performance. The KTM is already a beast and this made it into the Demon on steroids.
Item Reviewed: Synthetic SAE 10W-50 Dirt Bike Oil (DB50)
Reviewed by Bobby:
Best dirt bike oil on the market
I use the 10w 50 synthetic dirt bike oil in my KTM 350 SXF race bike. I have a rekluse clutch and with this oil, I can start the bike in second gear. With oils that I've used in the past, I was not able to start the bike in gear. In addition, I have a full season of two-hour woods endurance races on this engine with no sign of wear at all. I have friends with the same bike that use competitors oil that have already needed to rebuild both top and bottom ends. In my opinion, Amsoil 10W-50 dirt bike oil is the absolute best on the market!
Item Reviewed: Synthetic SAE 10W-50 Dirt Bike Oil (DB50)
Reviewed by Monte:
Without question the best product out there.
You have won my trust. Amsoil products are my default. I maintain my rigs, but run them hard. Sold my last truck at 275000 miles,wish I had kept it!
Item Reviewed: Synthetic SAE 10W-50 Dirt Bike Oil (DB50)
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Reviewed by James Bender :
From Lucas oil to amsoil db50
Was running Lucas oil and it's a amsoil rep that lives close to me he told me about the amsoil db50 I tried it and love it run it in my son's Honda 150r and in my Yamaha wr400 the cluch seems to be really smooth superior protection