Rotella T 5W-40 synthetic in Onan diesel generator?

Messages
91
Location
Long Island, NY
Howdy, I have been changing the oil in my Onan Diesel 12KW generator (stand-by for house) over the past 10 years (on a yearly basis [recieves very few hours]) with rotella T 15W-40. I noticed Rotella T 5W-40 Synthetic at Wal-mart and thought about switching to that. What do you think? [Confused] BTW, I live in NY. Possibly 90 degrees in summer, 14 degrees in winter. Is there a good chance of leaks after switching? [I dont know] Thanks, John
 

Al

Messages
19,152
Location
Elizabethtown, Pa
You shouldn't have any leakage issue. The Rotella Synthetic is what is called a Group III. Basically it's really not a "True Synthetic" as compared to Amsoil, Delvac, and Mobil 1. If you can get it for say 13 Bucks its a good deal, but I wouldn't pay the $20. And don't get me wrong-the Rotella "Synthetic" will be a better product than the Regular Rotella.
 

Hubjeep

Thread starter
Messages
91
Location
Long Island, NY
quote:
Originally posted by Al: ...If you can get it for say 13 Bucks its a good deal, but I wouldn't pay the $20...
Thanks, It only requires 1.6 Gal. Wal-mart has it for 12 dollars and change. I figure it would be far better for cold weather start up. -John
 
Messages
18,449
Location
East of IGO
Rotella" syn." will have way better cold pumping as a 05w/ .I don't think anyone can prove of it being better than regular Rotella except on cold pumping performance
 
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