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.
I like amsoil 5w-30 and do a liquimoly engine flush with every oil change.
On a new car, I change at 750, then again at 3000, and after that I do my regular once per year or 25,000 miles, whichever comes first, as stated on Amsoil Signature. I've been using this oil for decades in cars, trucks, and tractors. It's incredibly good oil.
I do a drain and fill every 30k miles with Amsoil cvt fluid. Both are still performing as new.
With a good filter (Fram synthetic endurance, Purolator boss, Amsoil) and a modern high performance oil such as Amsoil signature and Pennzoil ultra platinum you are good for at least 17.5k with the Amsoil and 12.5k with the Pennzoil under 'severe' conditions.
AmsOil 10w30 for turbo engines... haven't had any issues yet. Still consumes it though.
Absolutely Liqumoly!
Please never put Amsoil in a Volkswagen they under rate their viscosity/ wt ratings and the only time I used their oil I ended up spinning a rod bearing in my first R32
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