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.
Use Penzoil Ultra Plat. Can probably stretch it to 5k miles with no issues.
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 got better results from signature 5w30 at 11,200 mi than I did from Motorcraft “full synthetic(lies) at 4300mi. So I change my amsoil at 8-10k and my Pennzoil ultra platinum at 7500.
My 2024 Toyota Rav4 Prime XSE has had 2 used oil analysis tests done at 4k and 8k miles on Pennzoil Platinum 0w-16 and Eneos 0w-16. Both results showed both oils shearing lower and out of grade to a 0w-8 viscosity at 100C in 4k miles.
I know I was using penzoil back when I had a 90 325i, locked my engine up solid, mechanic said it had too much paraffin so yeah it matters personally I only use Mobil 1 synthetics
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