Mechanics

ENGINE OIL

2003 Hummer H2

Engine Performance problem
2003 Hummer H2 V8 Four Wheel Drive Manual 75000 miles

My truck has 75000 miles and I have been using regular oil. Is it too late to switch to synthetic oil?
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Luda81
July 31, 2010.



No!

Dr Loot
Oct 24, 2010.


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