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2008 Mazda MX-5 Valvoline Durablend 5w20 Motorcraft FL910S 24800 Miles

2003 Chevrolet Avalanche 1500 47610 Miles 5 Quarts Mobil 1 0W-30 AFE 1 Quart Pennzoil SL Synthetic 5W-30 Fram XG3506 I change once a year and tow a trailer. Average mileage the last few years is about 6000 miles a year.

2008 Mazda MX-5 GT 4 Qts Mobil Clean 5000 5w20 (From sale last fall) .5 Qts MC SynBlend 5w20 (Left over from last Oil Change) MC FL-910S

All things being equal - Supertech GM4718 spec $17.50 here.

2008 Mazda MX-5 PRHT-GT w/12k miles 4.6 Quarts Mobil Clean 5000 5w30 with ST Oil Filter Trying 5w30 after 12k miles of 5w20 seems good so far

#4 for 5k

Originally Posted By: daman Originally Posted By: kayster Originally Posted By: daman Why not use a synthetic and go off your OLM less oil changes for you. will aid in your towing also,PP is $20 at WM your cars are worth that no? Thats my dilemma if I was out of warranty on the MX-5 I think I...

Originally Posted By: daman Why not use a synthetic and go off your OLM less oil changes for you. will aid in your towing also,PP is $20 at WM your cars are worth that no? Thats my dilemma if I was out of warranty on the MX-5 I think I would just do 5w30 PP once a year on both vehicles. I am...

Thanks! I think 5w30 is best way to go to stock one oil. Should I feel dyno would be the best way to go on the Avalanche?

I have a 2003 Avalanche 1500 with 45,000 miles. The last few years I have been averaging about 5000 miles a year. Weekly drive 50 miles to work. I also Tow a Travel Trailer in the summer. 2000 miles in the summer 3000 in the winter. I do once a year oil changes in the spring, last year 5w30 PP...