Where in Onatrio are you buying oil?
#16
Three Wheelin'
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Yes, they're the same at the high end, but 0W-40 is formulated differently than 5W-40 - folks (like LN) that have tested have found that the 5W-40 oil provides a better protective film at higher operating temperatures than 0W-40.
#18
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My SAAB also specs 0W but I run 5W...
Last edited by GreatWhiteNorth; 07-06-2012 at 02:31 PM. Reason: Added M1
#24
Three Wheelin'
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Know what it's HTHS Viscosity is?
If its better than Mobil 1's (0w-40) 3.6, I'll probably go with it, since it's readily available at CT.
#25
Team Owner
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Also keep in mind many oils are chosen to get that fuel efficiency number
Last edited by theiceman; 07-09-2012 at 04:05 PM.
#27
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Have a look at this post:
M1 TDT CI-4+ / SL, the pre-SM formulation with even higher Zn and P levels than SM version currently available.
http://www.renntech.org/forums/topic.../page__hl__tdt
I switched to Motul X-Cess after.
No UOA available yet, but no oil added in over 5,000 kms and no shearing.
I would NOT go back to M1, 0W-40 or 5W-40. There are better oils out there.
YMMV of course.
Happy motoring!
=L=
M1 TDT CI-4+ / SL, the pre-SM formulation with even higher Zn and P levels than SM version currently available.
http://www.renntech.org/forums/topic.../page__hl__tdt
I switched to Motul X-Cess after.
No UOA available yet, but no oil added in over 5,000 kms and no shearing.
I would NOT go back to M1, 0W-40 or 5W-40. There are better oils out there.
YMMV of course.
Happy motoring!
=L=
#28
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- 4 times the simulation of 35 hours of summer driving,
- 4 times the simulation of 13.5 hours of winter driving,
- 40 cold starts,
- 5 times the simulation of 1-hour sessions on the “Nürburgring” racetrack,
- 3.5 hours of “running-in” program
Measurements on the engine and on the oil will be done at regular intervals, and the following parameter will be taken into account to grant the approval or not:
- torque curve (internal friction),
- oxidation of the oil,
- Piston cleanliness and ring sticking,
- Valve train wear protection. Cam & tappet wear must be less than 10 μm.
- Engine cleanliness and sludge: after 203 hours, no deposits must be visible.
- Bearing wear protection: visual rating according to Porsche in-house method.
#29
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Castrol 5W-40 shears down to 30 grade at about 6 thousand miles or so.
Stop by Renntech and search for posts by "JFP from PA". He covers it extensively and suggests to use Castrol 10W-40 instead with much better results. However Castrol 10W-40 is not available in Canada (at least not available in Western part of it).
So, change it frequently.
=L=