mobil 1
i know that this subject has been covered but i have a question that i could find an answer to. what is better for the 2.5 engine in sandiego? i found the 0/40 mobil 1 that is not ''energy efficient'' and the 15/50 in the quart that is not ''energy efficient'' and the 15/50 in the gal. jug that has the identical label on front as the quart but has an additional classification and IS ''energy efficient'' according to the label on the back
thanks in advance
willy
1999 boxter 2.5 w/ 55,000 miles
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