Rotella T Syn 5w40 v/s M1 5w40 or 0w40, cleaner?

Joined
Sep 30, 2007
Messages
999
Location
CO
Land Rover buddy at the office here said that the Rover guys are saying M1 keeps engins cleaner, so he's switchnig to M1 for a cleaner engine from Rotella T Syn. Im not thinking RTS is cleaner, but would think they are dead equal. Thoughts?
 
Last edited:
Joined
Jun 22, 2008
Messages
1,132
Location
Colorado
Hmmmm I think it is a wash. Both Synthetics do a very good job of keeping the engines clean. But think about this....Rotella is designed to go long, long in a commercial diesel engine and keep it clean and manage soot.
 

OVERKILL

$100 Site Donor 2021
Joined
Apr 28, 2008
Messages
47,088
Location
Ontario, Canada
 Originally Posted By: BigJohn
Hmmmm I think it is a wash. Both Synthetics do a very good job of keeping the engines clean. But think about this....Rotella is designed to go long, long in a commercial diesel engine and keep it clean and manage soot.
So is M1 TDT 5w40/Delvac 1. Do a search on Doug Hillary.
 

Nederlander75

Thread starter
Joined
Sep 30, 2007
Messages
999
Location
CO
Thats what Im saying. Unless you put these to enduro track use you wont see a difference and any difference may be simply application difference.
 
Joined
Oct 4, 2008
Messages
82
Location
Dallas
 Originally Posted By: BigJohn
Hmmmm I think it is a wash. Both Synthetics do a very good job of keeping the engines clean. But think about this....Rotella is designed to go long, long in a commercial diesel engine and keep it clean and manage soot.
more reason to use this for my track car that runs 11.5:1 AFR in boost. I'm really torn between using this oil on the track because of everyone's uninformed, arm-chair quarterback opinion and the threat or suspicion of foaming with long 4k-7k rpm exposure for 30-minutes at a time. However the UOAs look good.
 
Joined
Jun 17, 2005
Messages
4,942
Location
Billings, MT
VOA's I've seen on some Rotella T synthetic have been pretty low on calcium, so it's possible they don't clean as well as the M1.
 
Joined
May 9, 2005
Messages
1,134
Location
Chicago
What engine is this? That's insanely rich even for a turbocharged engine at max load at redline.
 Originally Posted By: hustler
 Originally Posted By: BigJohn
Hmmmm I think it is a wash. Both Synthetics do a very good job of keeping the engines clean. But think about this....Rotella is designed to go long, long in a commercial diesel engine and keep it clean and manage soot.
more reason to use this for my track car that runs 11.5:1 AFR in boost. I'm really torn between using this oil on the track because of everyone's uninformed, arm-chair quarterback opinion and the threat or suspicion of foaming with long 4k-7k rpm exposure for 30-minutes at a time. However the UOAs look good.
 
Joined
Oct 4, 2008
Messages
82
Location
Dallas
 Originally Posted By: vinu_neuro
What engine is this? That's insanely rich even for a turbocharged engine at max load at redline.
 Originally Posted By: hustler
 Originally Posted By: BigJohn
Hmmmm I think it is a wash. Both Synthetics do a very good job of keeping the engines clean. But think about this....Rotella is designed to go long, long in a commercial diesel engine and keep it clean and manage soot.
more reason to use this for my track car that runs 11.5:1 AFR in boost. I'm really torn between using this oil on the track because of everyone's uninformed, arm-chair quarterback opinion and the threat or suspicion of foaming with long 4k-7k rpm exposure for 30-minutes at a time. However the UOAs look good.
a built miata motor running 15psi through a gt2860rs, and the car sees track time. 11.5 is rich, but fat enough to compensate for 10% ethanol and keep EGT under 1300*F.
 
Joined
Feb 1, 2009
Messages
8,859
Location
Texas
 Originally Posted By: hustler
I'm really torn between using this oil on the track because of everyone's uninformed, arm-chair quarterback opinion and the threat or suspicion of foaming with long 4k-7k rpm exposure for 30-minutes at a time. However the UOAs look good.
Foaming? The turbo Subaru autocrossers seem to love RTS. No complaints about foaming from them. The only possible (rumored?) foaming issue I've ever heard was several years ago in Powerstroke hydraulically actuated/electronically controlled injection systems, and I haven't even heard that recently. As far as "cleaning" goes, I'd be inclinede to think that M1's PAO base might inherently prevent deposits ever-so-slightly better (probably never detectable in the real world) but that RTS's Group III+ base is a better solvent for additives and might remove existing deposits ever-so-slightly better. Just a wild guess- I really think they're dead equal in every way you'd ever notice.
 
Top