Customer Ratings & Reviews

This oil holds up to everything you can throw at it and in any situation. I highly recommend it for all vehicles.

I've been using 5W-30 Signature Series oil in my Toyota Tacoma since I bought it new in 2012. I now have 240,000 miles on my truck and it's still running strong with no maintenance issues. I strongly recommend this oil over any and all OEM oils.

The only oil I use in my vehicles and equipment.

This is the best oil I've ever used. I have much better oil pressure in my 2009 chevrolet silverado. It should help with the lifters.

Use their oils in my track car and two others. Have sent half a dozen samples for testing and always great results. I could easily take the oil a lot further. But I’m about the cheap insurance when it comes to performance.

When it's-20° below outside that's when Amsoil Signature Series really shines

317,000 miles. Change oil around 8000 to 10,000 interval.

Gives me peace of mind for ultimate protection! Best choice over Mobil 1, Castrol, Pennzoil, etc. Will purchase again

everything was fine

The best oil I have put in my vehicle, cleared up all my oil consumption issues and I haven’t had a 1qt low oil message in over 9,000 miles. I change my oil every 3500 miles but even on mobile 1 and mobile 1 extended performance my oil light would come on every 2000 miles. Hasn’t occurred since I switched.

I put it in my RAV4 crankcase. Some good stuffs.

Very delicious.

I've been useing this stuff for 6yrs now and in that time I've had 3 cars with well, 1 320k 1 460k & 1,200k. It's great oil and I've been doing 10k oil changes for oil to last like that it must be good. But I use there oil & matching filters. Had a Ford edge with 200k was sounding rough on start up, like a lawnmower when I 1st got it and oil pressure light was coming on changed oil with amsoil & filter and my wife's been driving it for months now and hums like a sowing machine now nice & quite. Also use it in my pride & joy my dad's old 73 Pontiac firebird formula with the original poncho moter in it. Great oil and is no higher than what's on the shelf when u set up your own account and so much better oil.....if u want to hit 400+k use this oil....

Engine seems to run smoother and quieter 👍

Only disappointment was I did not receive the promised gift of a telescopic wand.

For my new Subaru. May it last forever

Great product running it in all of my vehicles. Noticed a big difference in the performance of my vehicles.

Hope to have good results.

Very happy with purchase.

Very happy with purchase