03tlCHARCOL

iTrader: (3)

Did a search and I couldn't find an answer. I know the Mobil 1 high mileage is the old formula, which is the good stuff. But what's the difference with the Mobil 1 extended performance. I usually go with the high mileage but the extended performance was on sale at Wal-Mart.

Is it okay to mix the 2 oils? I have a lil left over of the high mileage from my last oil change.

Thanks.

Gfaze

As long as it's the same weight you can mix them.

fsttyms1

The extended performance from my understanding is the better oil.

01tl4tl

yes- I too heard that EP is the good OLD formula m1
and the high mileage is the cheaper base oil stock allowed by law,,,and not as good

03tlCHARCOL

iTrader: (3)

Hmm really? When I searched I was reading that the high mileage stuff was the Old formula aka the good stuff. So I guess now the EP stuff is now the better stuff? lol

piggylover1985

I use Castrol GTX high mileage on my engine every 3000 miles.

fsttyms1

3k is a waste. the manufacturer (acura) recommends 7500 intervals

01tl4tl

03--
I was going with kris on this--but if you found the page that says which is the good original,, please correct me

Im on penz platinum so dont really care but like to give good info

phee

iTrader: (5)

i use penz

snowman81

Mobil 1's website says the High Mileage is protection for up to 5000 miles or 6 months whereas the EP says up to 15000 miles. Plus, the High Mileage also has a lot of cleaners in it. Probably explains the shorter life. I normally get the EP.

01tl4tl

there is an actual key differance in the base oil type used in the two.

one has the original formula-pre govt decision--and the new stuff has less quality base but gets to call itself the same as old good stuff