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    Change type of oil or not.

    Thanks all. Next oil change, which will be at 101k miles, I'll probably finally switch over to full syn, but will pass on the high mileage part. Unfortunately, I don't change my own oil. I did in the past, but not now. For one reason, my truck had a 100,000 mile extended warranty so I always had...
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    Change type of oil or not.

    Thanks all. Sounds like it's a "leave well enough alone" situation, with the possibility of moving to full synthetic.
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    Change type of oil or not.

    My 2014 F150 with 3.5 EB engine will top 100k miles when the oil is changed next time. It's at 96k miles now and the oil is changed every 5k miles. Until now, I've always used Motorcraft 5w-30 Synthetic Blend oil. Would it make any sense to change to a high mileage full synthetic oil next time...
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    Using heavier oil in high mileage 5.7L Chevy

    To add to my original post, the van, which is the chassis for a 1996 Roadtrek Class B RV, was a one owner whose son, a master mechanic at a new car dealer, changed oil in it every 3-4k miles using Motorcraft 10w-30.
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    Using heavier oil in high mileage 5.7L Chevy

    I have a high mileage(95k+ miles)1995 Chevy Extended Van w/ a 5.7L engine. The owners manual calls for 10w-30 oil. However, when idleing the oil pressure dips to the next to lowest mark for oil pressure, I think 20# psi. As soon as I give it gas, the needle jumps to about 60# psi. Is it ok to...
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