dodge guy wrote:
PastorCharlie wrote:
Ford recommends oil change every 7,500 miles on V-10. That is 2 for every one on diesel at 15,000.
Math and reading are very interesting studies. :)
That is wAy too long to go on an oil change that is running at 100% of its duty cycle! I always recommend a gas engine oil change every 3-4K miles. I always did 4K miles with mobil1 synthetic.
Wow. I did oil changes at 15,000 miles with Mobil 1 in my car...changed the filter at 7500 and topped off (put almost 200,000 miles on it before I sold it, then over 175,000 on each of my next 2 SUVs with Mobil 1 - I must have been doing something right). At the Kennedy Space Center I was over a study on Synthetic oil. We found it could go well over 15,000 miles on a gas engine with no wear to the bearings and piston rings. I disagree with your comment of 7500 miles is too long. Maybe 30 years ago yes, but the additives in oil have improved dramatically so 5-7500 miles is actually common now even with standard oils. However, on a diesel engine the advantages of synthetic oil go away because of the sulfur, which is a by-product of the combustion process and breaks down the synthetic oils.
Al
