Mobil-1 guy myself, at least so far. No issues, good price
Mobil 1, it’s better than 99% and you can get 4 quarts for $27 at Walmart.
Don’t use royal purple heard so many bad things about how it’s not a good brand anymore, I swapped to penzoil oil plantinum 5/30 and honestly the car feels a lot smoother and sounds a lil less ticki but still I’d recommend anything other than royal purple
One poster said it right; Amsoil is a Multi Level Marketing program and that's why it's so expensive. Yes it's great oil, however, the Penzoil ULTRA Platinum is high in detergents that keep your engine clean. It's made of natural gas, an industry first, and is so pure and clear you can hardly see it on your dipstick.
Mobil 1 full synthetic 5w20 or 5w30 is best in my opinion, and I’ve always just used a fram ultra from Walmart never had any problems and my K20 seemed to enjoy it
I always run 5w30 Pennzoil Platinum in mine. I have run other brands, but I have settled on this. Easy to get, often on sale, excellent oil.
My tacoma has 352000 miles have always put mobile 1 in it
Pennzoil Ultra Platinum in my 2016 Focus ST. It seems to love it. Quieter idle, great gas mileage, drives smoother after a cold start.
My changes have generally been religious at 5k and that didn’t save my GTI from losing compression in cyl3 at 37k untuned miles it suffered 15% leakdown vs the other 3. That car got M1 0w-40, tried and true stuff, so you just never know.
I used Valvoline synthetic in my first SHO, and I am using Mobile 1 in my latest SHO. I tried Pennzoil in my 5.0 (Windsor) and all the lifters started clattering.
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