Quote:
Originally Posted by toddman67
I think you should visit www.machinerylubrication.com and look up the articles that talk about synthectic and conventional oils. These articles describe pros and cons which are different for each of us and our driving habits ETC.
You need to base your decision for your application.
Some guys have no problems switching, however others contradict these actions based on bad experiences.
Personally I would'nt change this late in the game and would stick with what has worked for years, but this is just my opinion. |
Thanks for the link to Machinery lubrication. They offer a lot of great info. I personally have switched my SUVs to Synthetic motor oil. I run 15-50 in both. Does it work better who knows. What I do know is our Blazer 4x4 when bought used had 87,000 miles & at 89,000 developed an engine knock (piston slap). I switched to synthetic oil & the engine now has 117,000 miles & the knock isn't any worse oil pressure remains the same & fuel mileage is 18-22 MPG. To me I buy Napa oils & mineral oil is about $3 & synthetic is $4.39. I extended my oil changes from 5000 miles to 7500 miles. So I find synthetics to be a little more cost effective. Our other SUV is a 98 Jeep Grand Cherokee Limited 5.9 with 123,000 miles.
But I agree with those that say leave it as it is. 180,000 miles is a lot of miles. If mineral oil got you there then stay with it. The best of your truck is used up IMHO. I have run vehicles to 300,000 but I had to do a lot of rebuilding of parts to get that. If it was a Toyota, Honda that would be different. I'm a retired mechanic.