I just changed my oil to 5w 40 rotella t synthetic, Has any body else did this ? What kind of results. Does cummins approve?

 

well the dino rotella is cummins approved so i don't see why the synthetic wouldn't be

was going to do a change to synthetic last oil change but stuck with the dino.

15w40 rotella 15 dollars for 4 liters. synthetic 5w40 30 dollars for 4 liters

 

I've been using it for about 3 years. I like it but you may have to replace some seals if you switch over. It doesn't damage your seals but it does clean all the sludge and gunk away which may have been plugging bad spots in the old seals. So depending on the condition of your seals you may start having leaks. It happened to both my trucks when I switched over. I think it's worth it though. It's not a true synthetic it is dino based, but it is comparable to sythetic. I have read that synthetics nearly eliminate wear so to me its worth using. The first thing I noticed upon swtching was the engine spun much easier and I did notice slight MPG increase.

 

Ive been running it since June and it runs great, hasnt needed any added fluid yet, and still looks good. My plan is for one oil change per year with this stuff as I average 7500 to 8500 miles a year. I plan on having it analyzed in April or May to see how its working

 

thats it???? wow you barely drive that thing.

 

I use Amsoil in mine 100% syn 5w 30 year round bought the truck used with
130000k no leaks runs smoother increased MPG an my oil samples show basicly no wear . But he's right if you have a motor showing evidence of leaks
sometimes a synthetic in the process of cleaning everthing up will leak . That being said good quality syn lubes have addatives in them that help condition seals an prevent seal wear an leakage .

 

Thanks guys, I need to up date my truck has 41,ooo on it now. I was wondering if 5w40 is going a little to thin, as in 5w.

 

yep thats it

 

Yep, changed over to Rotella 5W-40 "CI+4" oil in December. Alot more stinkyer than the 15W-40 "CJ" stuff that was in there. Spins over easier in the morning and mileage appears to be up.

 

Thanks, for all the info, I'am glad you guys are out there. Tig
Any more info is appreciated.

 

I'm a 12V but in the winter I mix 2 gallons delo and 1 gallon rotella synthetic, starts better and runs smoother not to forget its quieter

 

just switched to rotella myself for easier starts for the winter... no complaints other than the smell for the first week

 

Rotella Syn gives almost instant oil pressure even in REALLY cold temps.

It's a great winter oil, imo. There are other great winter oils out there, too (Valvoline PB extreme, Mobil 1 Turbo Diesel Truck, Redline 15w 40, Royal Purple Longrider, etc etc).


JMO