Product Reviewed: Synthetic SAE 10W-40 Dirt Bike Oil (DB40)
Current Rating: 5 out of 5 stars
Votes & Reviews: 56 vote(s) and 61 user reviews.
Reviewed by Moto Mike: 
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.
Reviewed by Robert:
Been using Amsiol in my racing motorcycles for more than 25 years and love the performance and wear protection it gives.
Reviewed by Jim:
The only oil I use in my bike.
Reviewed by Cliff:
Amazing product
Reviewed by Willie:
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!
Reviewed by Bart:
My regional dealer I get amsoil through is without a doubt the best freaking guy ever! Always resolves any issue I've had imeaditely
Reviewed by Bob:
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.
Reviewed by Matt:
Put this oil in my CR 85. Clutch feel is better and gear changes are smoother.
Reviewed by Rpm:
Can't buy better
Reviewed by Dk:
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.
Reviewed by MikeB:
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.
Reviewed by Jimmy:
I use it in my 2003 Suzuki DRZ 250
Reviewed by Believer:
Seems to work great and good clutch feel. Great price compared to dealer oil prices.
Reviewed by MOTODADJLG:
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.
Reviewed by The pro lube:
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!!!!!!!!!!!!!!!!!!!!!!!!!!!.......
Reviewed by Evan:
Use this in my 2017 Benelli TNT 600. Makes it run like a champ!!
Reviewed by Dave in CO:
I use this oil to keep 3 different enduros running strong.
Reviewed by Dewey:
Three dirt bikes running strong no clutch slippage great product
Reviewed by S409:
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.
Reviewed by Casey:
Use in my son's KX250F dirt bike. Noticeable power increase, clutch feel, smoother running and holds up longer than other oils between changes.
Reviewed by KTM MX:
We use this on our race bike and when we service it still looks clean
Reviewed by Jet A Racing:
When your race counts on superior engine performance there is none better than Amsoil to give you the confidence in your motor.
Reviewed by Mike:
Never had a oil related failure
Reviewed by Mike:
This oil runs awesome in my son's kx100.
Reviewed by Bill:
I use it in my 2011 KLR650. My bike shifts better since I switched to AMSOIL and performance is much better overall.
Reviewed by Dave:
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.
Reviewed by BMW Rider:
I use this in my BMW adventure bike which sees hard use of the clutch in off highway riding to work through tough terrain.
Reviewed by CAJO:
Love Amsoil products. Something I can count on always working even when racing is unpredictable.
Reviewed by Jeff:
Great product! Use on 4 strokes off road bikes that I service! Great protection, quality & consistency!
Reviewed by Jordan:
Quality product
Reviewed by Bobcat1:
Use this product in two dirt bikes my son and I ride and race. Will use nothing else but Amsoil!
Reviewed by E Fryer:
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.
Reviewed by Gary:
Ive used amsoil since the 70s and I fill its the best product on the market. I mix it 83 to 1 with aviation fuel and its the best,no build of carbon at all!!!!!
Reviewed by Big Show:
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!
Reviewed by Trip:
This made the clutch in my Gas Gas TXT 280 Trials bike operate with better control.
Reviewed by El Cora:
Use this oil in dirt/racing bikes. Have been using this oil for the last 5 years in all of our bikes. This product helps the performance of the bikes and would use no other.
Reviewed by Chamo:
I use in my dirt bike, excellent!!
Reviewed by Ray:
I will only run Amsoil in my dirt bike. I change the oil in my 4 stroke 250cc engine every 8 hours. I have over 250 hard woods hours on that engine....and it is still going strong!!!
Reviewed by FMB:
I use it in my honda 450x and the clutch feel is real.Amsoil said it helps your clutch and they aren't lying.
Reviewed by BC:
Amsoil dirt is exceptional in my Honda. Clutch works great and my motor stays clean!!
Reviewed by johnny:
never disappointed use it in everything
Reviewed by Charlie TUNA:
Grandson races his bike. And this oil seems to help and last longer!!
Reviewed by Dirtbike dude:
Product allows us to run more hours on our KTM's before engine overhaul. Great product!
Reviewed by Dan:
I have a lot of engines in different kinds of equipment and vehicles. I use Amsoil in everyone of them except my airplanes. Have been using Amsoil for over 30 years. If I live long enough I will use it 30 more. Great oil and great customer service.
Reviewed by Jonny O:
Best oil around!!
Reviewed by Enduro:
I switched my transmission oil after I was experiencing some clutch drag from my motorcycle once I switched the clutch drag issues were gone great product
Reviewed by Srt:
I use this in all of our dirt bikes and atv's. Nothing but smooth running, shifting. The best.
Reviewed by pro4100:
I dont need to say anything. I am an Amsoil for life customer. Enough said!
Reviewed by Gc131:
I use this in my 2015 crf450 in both case sides. Works great in the engine and on the clutch side.
Reviewed by Weasel 247:
I used this in my 2007 CRF250R and now it the only oil I used since the first oil change on my 2016 CRF250R and sons 2017 YZ125
Reviewed by Jay:
This is by far the best oil i have ever ran in my bike. I have ran synthetic mobil 1 before this and the bike just didnt run as good when i put mobil 1 in there. Amsoil changed that. Thank you Amsoil!
Reviewed by Stanfill25:
I use this on my Dirt Bike and use amsoil on every motor I own
Reviewed by Big G:
I've been riding,racing and maintaining dirt bikes and other motorcycles for over 40 years I have been using Amsoil in all my trucks and motorcycles for around ten years. I have never had a engine failure since moving to Amsoil from Pensoil I have a 2015 Suzuki rmz 250 that I trail ride and my son rides motocross on. I change the oil and filter every 6 hrs per manufacturer recommendations. No problems at all.
Reviewed by Rustdoc:
I use this in the kids dirt bikes and side by side. The performance has been enhanced tremendously.
Reviewed by Ebear546:
Great product. Oil still looks good after 2-3 times longer change intervals in my KTM.
Reviewed by Tool Box:
I have been using Amsoil for years during my GNCC off road race seasons without an oil related failure. This year I'm running 10w 40w oil designed for dirt bikes. Four races into the season and no problems and clutch wear has been minimal. VEry good product
Reviewed by Barry:
Used in my son's KX 85. Great product with maximum protection while delivering incredible performance.
Reviewed by Lance:
Since changing to Amsoil my 2016 KLR 650 idles, runs quieter and much more smooth. It shifts more precisely and smoother. I noticed the idle RPM increased slightly. I am very pleased with the results.
Reviewed by ANDREA:
We run this product in our dirt bikes and have had nothing but Great results!! As always Amsoil Rocks!!
Reviewed by Tracy:
I use this in my 2009 WR450F it is a great oil.
Canada
United States
I would buy this again
I race dirt bikes and have found this oil to stay cleaner than others after 10 hard racing hours.