So I just saw the new Mobil 1 commercials....they now have 5,000/7,000/15,000 synthetics available now. I run synthetic in the Vette, and it has an on board life remaining meter, but I typically change every 5,000 miles. The Explorer is running on regular oil, but it now has 67,000 miles on it and just got new tires, so I`m thinking of converting over.
1) I only run 11,500 miles on the Exp. per year and change the oil every 4,000 miles. In reality, would I be doing more harm by putting in the 5,000 mile (change twice a year) or the 15,000 mile (change once a year)?
2) If you run either of the above two, should you change the oil filter more often than once or twice a year still? (I`m assuming so).
The Explorer is running great. In April, it will be 6 years old, so I`m keeping less than 12,000 miles/year on`er. I wasn`t much of a maintenance buff in my earlier years, but in the last year or so have been doing more things myself. I just replaced the serpentine belt last week and went ahead and did new spark plugs, fuel filter, but was wondering if I should be looking at anything else?
I appreciate your help guys!!
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