Lower oil temps w/GC

Messages
207
Location
S AZ.
Had my first chance to drive the C6 with the new load of GC and notice a definite drop in oil temps. Normally my oil temp is 223 when I drive home from work. Today, it was 216. Nothing else was changed. The traffic was, if anything, a little smoother flowing which would cause the temps to come up a little, higher speeds ya know. Has anyone else noticed this much of a change in their oil temps? This is pretty cool but I cannot figure out why GC would be that much cooler than Amsoil 5W-30. Thanks
 

Patman

Staff member
Messages
22,000
Location
Guelph, Ontario
My C5 (which has GC in it) seems to run lower oil temps than other C5's I know about. I typically see the oil temp around 195F in traffic on a 70 degree day, or around 207F at 70mph on a 70 degree day. Even after I drove it pretty hard the other day it only got up to 217F.
 
Messages
40,710
Location
Great Lakes
Switching from M1 0w-40 to SLX 0w-30, I haven't noticed any change in oil temps in my 1.8T. Too bad, cause I'm worried my engine is running too cold (175F in normal driving).
 
Messages
18,449
Location
East of IGO
quote:
Originally posted by Quattro Pete: Switching from M1 0w-40 to SLX 0w-30, I haven't noticed any change in oil temps in my 1.8T. Too bad, cause I'm worried my engine is running too cold (175F in normal driving).
175 is warm enough,remember the oil gete alot hotter as itcirculates through the pump and bearings etc. oil temps are like oil viscosity .the oil should be thick enough to keep the parts seperated but not to thick as to cost extra power.
 
Messages
680
Location
Iowa
If you guys will indulge a short story - Part of what originally got me using synthetics was my Dad's experience as technician in charge of maintenance at a power plant. They had big conveyors, driven by big worm gear reducers, that moved coal up to the boilers. A lube salesman gave him some synthetic gear lube (Mobil I think) to try to get him to use it. Dad then put it in several gear boxes on one conveyor, but not the other. When both conveyors were running side-by-side, you could rest your hand on the syn-lubed gear boxes, but the dino-lubed boxes were too hot to touch. [I dont know] He and I both started using syn wherever we could. Just anectdotal I realize, but we were obviously impressed.
 
Messages
716
Location
San Gabriel Valley
I also think my oil temp in my 1.8T is now running lower with GC. Prior constant use of thicker 5w40s in my car had yielded recurring coolant leaks by the oil cooler lines next to the oil filter...but since I ran GC for like 200+ miles now the leaks had mysteriously ceased. [Confused] Could it be that the 5w40 caused higher temps/exceedingly hotter & higher coolant pressure..thus the leaks? Whatever it is, GC is really exceeding my expectations.. [Cheers!]
 
Top