10-30 heavy duty

[Bob]

Would a heavy duty dino oil give the same entended drain intervals as a synthetic? They seem very capable since they are used in the big rigs and a 10-30 would keep the warranty intact. The added bonus would be the cost is less than synthetic. I have yet to hear of a problem using these kind of oils, after all, they are SL rated. I think they could easily handle a 10,000 mile or once a year. These are diesel oils are they not? Any comments are appreciated.

 

[MolaKule]

Yes, but the big rigs also have umpteen gallsons of oil in the sump, which relates to less stress on the oil and a constant additive reserve. Without oil analysis, I wouldn't go past 5k on any dino, HD or not.

 

[Steve S]

The heavy duty oils would give an extended oil life compared to auto oil , look at the results from the Schaeffer oils ,but these oils had analysis done on them. Big diesels as well as 10+ gallon sumps have bypass filters to keep the oil cleaner.

 

[Al]

OK-I'll bite. What is a "Heavy Duty" oil?? Last time I heard this term was about40 years ago when "MS" (Motor Severe Service) was the latest SAE/API spec. They had at time a "Heavy Duty" oil which I believe was not really "Heavy Duty". I believe it was "Detergent Free" It was intended to be used in small 4 cycle engines (lawnmowers) Wow-this is bringing back memories [ March 10, 2003, 09:23 PM: Message edited by: Al ]

 

[Ken2]

quote:

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Originally posted by Al: OK-I'll bite. What is a "Heavy Duty" oil?? ....

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Diesel engine lube oil. Ken