When there's a sale on 5 quarts, I try to buy 10 and I either tell the clerk to get filters for his own car, or I grab a couple for the Toyota or GMC (I have 6 extra filters for those cars laying around).

The last price I paid for quarts at Wal Mart was around $6.50, I think. I don't understand why the price of synthetic oil is skyrocketing faster than real oil at the auto parts chains.

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1996 C280 289K Traded
1997 E420 167K Traded
2001 S430 240K Traded
2010 E550 4matic 80K
2000 GMC Jimmy 198K Gone to Boneyard
2003 Camry LE 196K
2011 Mazda3 i Sport 31K