Customer Ratings & Reviews

I have never used the 5W-30 product before, but the vehicle I'm replacing (a 2004 Hyundai with 220,000 miles) never had anything except Signature Series 10W-30. When 'Sam' got totaled, I had NEVER had to add a quart of oil between changes. Everything I own that has a motor has Amsoil in it.

It's good oil. Expensive but good. Looks clean after I change it. Can't complain

I have had 2 vehicles that required 0w20 oil. Both vehicles had variable valve timing engines and the oil worked very well for them. It allowed easy cold starts and provided good fuel economy.

I have used this for several years in all my vehicles. I think it provides the best protection against wear in the engine. Plus in the long run I think it is economical to use, change once a year or 25,000 miles.

I have used this oil before, and I'm glad I'm using it again. This oil helps my engine run better, I'm pleased with this oil.

I am very busy with family , work and play.. so to use this product makes my life a little bit simpler ., I put it in all my vehicles ..so I only have to worry about the oil once a year .. and the protection it gives is also peace of mind .. excellent product. Thank you amsoil .

BEST OIL SOLD IN THE USA, NO MATTER WHAT TYPE OF CAR YOU DRIVE

Have used this product for a couple years now. Great oil. Will not use any other oil

I bought my new 2008 Hyundia March 2008. In June 2008 I changed oil for first time miles 7240. I stared using Amsoil 0W20 and I'still using the sme oil, Amsoil 0W 20. Now the car 320337 miles and NO engine problems. I drive between 12,000 and 15,000 miles and change the filter and add a quart of Amsoil and I'm good for another 15,000 miles. I do routine basic maiintenance,but the engine has never been apart execpt for the timing belt.

Great product! I use the same oil in both my vehicles.

I've used Amsoil in my personal & family vehicles for over 10-years now. For these applications I use the Signature series 5W, and 10W-30. Since switching to Amsoil I've had zero mechanical motor issues and both engines are now approaching 200,000 miles and still running strong! I'm a DIY home mechanic so my cost per car is about $65 a year (including everything: tax, shipping, oil and filters). Amsoil is... Superior protection with just one oil change per year, per car! You can't beat that!

this is an outstanding value. great lubrication great price! always recommend amsoil to everyone I meet.

The engine flush is amazing! I just picked up another gen 1 cummins that has had cheap oil it's whole life....flushed with Amsoil engine flush and wha came out was amazing.....dirty sticky Nast oil clobs....then added the Amsoil 5w30 and installed the oil bypass filter as well and my oil is as clean as it looked when I dumped it in two weeks ago......great products......well pleased.....pricey but very worth it.

Having used amsoil for many years I am sold on the product.however a recent occurrence deserves mention. A 2004 Toyota Tundra belonging to my girlfriend has for the last 12 years Had a mild knock at every cold startup that subsides as the engine warms up. I persuaded Her to let me put Amsoil in on the last service. The knock was there at initial startup but I noted Did not take near as long to quite. It has not made the sound since. 3000 + miles.

Have been using Amsoil for 20 years. It only gets better.

Only use Amsoil in all my engines

I use Amsoil in my farm equipment and vehicles. Use nothing else.

OK, fewer oil changes, better gas milage, longer lasting engine, easier winter start ups, less foreign oil. Need I say more?

I have a 2000 Honda CR-V with 240,000 miles on it. The first 40K was conventional oil, then I switched to Amsoil full synthetic. At 240K, it does not use any oil between its annual oil change.

I have been using Amsoil products for several years. It is something that you cannot see working but the high milage I have attained on several vehicles while using your product is proof to me that it is good. A few mechanics that I trust have advised me over the years as to what a great product Amsoil is and based on their recommendation and my own knowledge I wouldn't use anything else in my vehicles. Keep up the good work your founding Father started and continued testing / improvement and ease of ordering is always appreciated.