Customer Ratings & Reviews

I began using Amsoil products over a year ago. So far I have converted all my vehicles to Amsoil. Since changing to Amsoil, I noticed that the engines run much quieter and my gas mileage increased an average of 5 mpg. I like the extended drain intervals and the protection I get. I have two high mileage vehicles and I noticed that the oil is cleaner when I check the dipstick and it's not as dark as it was when using regular oil. I highly recommend this oil.

Best oils ever hands down run it in all my cars including my 331

Use Amsoil in all 4 family vehicles, never let me down and is cheaper than conventional oil changes. Switched a 2005 F150 leased truck that I bought to Amsoil, now has 233K on it & still going strong. Mike

Have a new Jeep Wrangler and figured I should change out the factory oil a bit early after break-in of the engine. Used the Signature fill as I keep my vehicles for a long time. May have seen a small increase in mpg.

After 6000 miles oil is still clean

I switched to amsoil at 100k and original engine went 445K. Changed oil and filter every year at Christmas. No way that would have happened with conventional oil. For years now have run amsoil in everything I have. Good stuff.

I've used this in my daily driven SRT 8 for 10K miles, Blackstone oil sample came back with great results and they suggested I could go longer.

Signature Series 5w-20 goes in my two Honda Accords. Great oil that keeps those Honda engines going and going. each Honda has over 170,000 miles each and run great. Won't use anything else.

great product

This oil stands up excellent in my vehicle, the level never drops and even the colour of it doesnt change much between oil changes, never black when it comes out! Fantastic oil!

Use it in my 09 chevy z71 4x4 since new Use in my wife's car.

I've been using this oil for 3 years now. My 2007 F150 has 135000 on it now. I like only having to change my oil once a year.

I drive a 05 ram with the Hemi. It holds 7 qts and oil changes were getting expensive. I noticed no matter the brand i would use at least 1-2 qts between oil changes which was around 3000 to 4500 miles. Since swapping to the signature series i went for an initial interval of 15000 miles. I noticed i would only use 1 qt every 5000 miles. I also noticed the truck doesn't tick and i haven't? noticed a significant change in fuel economy. But i will be buying again this time attempting 25000 miles.

I have been using Signature Series 10W-30 Synthetic Motor Oil in my vehicles since 1998. I still use it in my 1997 Dodge Dakota pickup, which now has just under 120,000 miles on it and it still doesn't use any oil, even though I only change oil every 15,000 miles, and only change the filter every 7,500 miles. I was using this same oil in my 1998 Dodge Intrepid sedan until we were involved in an accident with it in 2012, at which time the vehicle was declared a total loss (with just over 214,000 miles on it, and it still wasn't using any oil, even though I only changed oil on it every 20,000 miles, and only changed the filter every 10,000 miles. Up until the time the car was declared a total loss, the engine had never been worked on for anything other than changing the spark plugs every 100,000 miles. We would still be driving it if it hadn't been for the accident that made it a total loss.

I only use Amsoil in all my vehicles. Amsoil extends my oil change intervals and improves my engine performance. I'm well pleased with how this oil performs against conventional oil that I used in the past.

Car runs strong and smooth

Been using this oil for 12 years.

I put 100 miles a day on my daily driver. I purchased it with 40,000 miles on the odometer now it has 84,000 miles on it. 4 qts go in, 4 qts come out.

I love all Amsoil products very satisfied a longer duration before changing oil ever 6 to 7 thousand better than every 3000, with conventional oil.

Eliminates rough idle and extended change intervals beyond what a typical customer expects. I get great feedback from my customer base and it saves them money while protecting their engines with premium product.