Amsoil always over anyone. I started with AMSOIL in 2004 and after pulling my Hayabusa Engine @ 20k miles to build for a turbo kit, the engine teardown was perfect, the block, pistons and bearings looked entirely new.
Have noticed on several times that when I went from Subaru OEM oil to Amsoil BACK to OEM that it runs much quieter and smoother on Amsoil.
But I run Amsoil signature blend in my vehicles. And I also push 15,000-25,000 miles per change.
I have seen my friends and family use amsoil for 25000kms each change and their cars do 200k- 300k without any engine issues.
I already added to engine oil and transmission. 5mpg improvement avg. already.
Switch to Amsoil products and go every 6,000. I honestly would go every 7500 with it if it was me driving that much.
Send your used oil to Blackstone or Amsoil for analysis and all of your questions about oil will be answered.
The best all rounder motor oils currently in the US are Pennzoil Ultra Platinum and Amsoil Signature, the latter you can run for at least 20k normal service or 15k extreme service.
I have amsoil in mine. I went 7500 once. Im sure anyone can go 10k with amsoil but it will be dark oil when u change it out lol
Amsoil is overpriced and underperforms. I’ve bought $1000s of dollars of their race oils and have slowly realized all are near the worst on market, always the worst for the coin.
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