Re: OT - synthetic oil

Posted by stum on May 07, 2005 at 16:42:05 from (4.155.66.35):

In Reply to: OT - synthetic oil posted by Jim.UT on May 07, 2005 at 11:11:48:

My wifes 96 Suburban has 219,000 hard miles on an untouched engine (7.4) running Rotella 15-40 since its first oil change.It pulls a 2 horse trailer 3-4 dys a week. I change the oil and filter every 4000 miles. It doesn't use any oil,still carries 60# oil pressure hot. My Dodge Diesel pickup has 378,000 miles on an untouched engine also running Rotella on a 5000 mile oil change.I have had excellent result running Rotella and with my change intervals,I sure can't justify the extra expense of synthetic(almost 3 times the cost)You still have to change it at the recommended intervals.Saw the 5th wheel in the back of your truck,towing is considered extreme service (3-4000 mile interval is recommended),7 quarts of mobil 1 and a filter=$50+every oil change,or 7 qts of 15-40 Rotella and filter=$14+ every oil change.Just don't add up to me.

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