Quote:
Originally Posted by Beau388
Shear generates heat. The more shear the more heat. So unless you have a 22 qt oil pan and a huge oil cooler, you are going to coke the conventional oil (oil temp above 270 F degrees). Synthetics do not begin to degrade until over 320 F degrees and some group 5 oil is stable to 525 F degrees (Mil Spec 7808G).
I have a Jetta 2L TDI. The only approved US oils are Mobile 1 ESP 5W30 (available at Ram dealers) and Castrol SLX gold 5W30 (available at VW dealers). Its little 118 cuin engine produces 236 ftlbs of torque @ 1,500 rpm under 26 lbs of boost, so I would say it is stressed. Oil changes (4.3 quarts) are recommended at 10,000 miles or 1 year which ever comes first.
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I agree, just like Cummins generators say synthetic oil isn't necessary, it depends on how long you want it to last. They don't say not to use it. I keep things forever except for my class c motorhome. It's up to the person are you going to sell it in a few years or keep it a long time
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