Mobile 1 synthetic oil @ Costco

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It goes on sale at this price every couple months. I typically pick up a case or two each time and use it in all of our vehicles. I just switched oil in the truck, but will still use this in the corollas. Good stuff.
 
I've never used anything but regular oil in the cruiser and the only time I've ever had an oil leak was when the valve gasket went and needed replacing. I know some have reported leaks when changing from dino to synthetic, so I've never bothered...and at 232,000 miles why at this point. Cars I've owned that came from the factory with synthetic, I've kept using it. One time back in the 80's I switched a Mazda 626 from dino to synthetic and it leaked like mad. Switched back and never a problem again.
 
I run Mobile 1 in everything I own, cars, trucks, motorcycles and lawnmowers. It actually costs less to run it because you can run it more then twice as long. I do oil changes about every 8,000 miles with Mobil 1.
 
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I run Mobile 1 in everything I own, cars, trucks, motorcycles and lawnmowers. I actually cost less to run it because you can run it more then twice as long. I do oil changes about every 8,000 miles with Mobil 1.

In '94, Toyota only recommended oil changes every 7500 miles. I do mine every 5000 miles now. After my experience above, I've been reluctant to try Mobil 1 again.

You could probably stretch synthetic changes to 10000 miles easily. Shoot, Porsche only recommended oil changes every 15000 miles on Mobil 1 their cars are/or used to be delivered with new.
 
Every oil change since out of its warranty has been on Mobile1. So roughly 250k miles on synthetic. On my rebuild it's synthetic oil after running the first batch on dino for break in. Zero leaks and zero issues. Rebuild was due to head gasket.
 
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