Stock Bold CFE rims good-looking enough to me :-)

Here's what I found from Petronas:

Syntium 800 SL 10W-30
Viscosity at 40 °C 74.1
Viscosity 100 °C 11.2

Syntium 800 SM 5W-30 (I'm currently using this)
Viscosity at 40 °C 62.3
Viscosity at 100 °C 11.1

Same viscosity at 100C, not much difference at 40C (start-up temperature). Fully synthetic engine oils don't have 10W-30, only 0W-30 due to much stronger film strength.

This article tells more :

http://www.worldsbestoil.ca/which-30-weight-oil.php

Not all SCs have 10W-30 oils, hence why I use 5W-30 instead. On my 1000km service I even have to use 10W-40 bcoz that SC doesn't have 30-weight Petronas Syntiums.

As long as it doesn't void my warranty I'm fine with that. Perhaps I'll switch to Petronas Syntium 5000 0W-30 on my next service.

IMO either 5W-30 or 10W-30 should be fine for our weather. Petronas Syntium 10W-30 flows at 74.1CST at 40 degrees while Petronas Syntium 5W-30 flows at 62.3CST at 40 degrees. More than thick enough for our weather. Plus 5W or 0W flows faster at startup than 10W, even in 25-35 degrees here, meaning better protection due to less time to reach engine on startup.

Viscosity at 80-100C is more important, here both oils are same. Otherwise Petronas/Mobil/Castrol won't dare selling 0W-30 synthetic oils locally.

That's why I wonder why Proton discourages lower than 10W. Perhaps it's due to 10W-30 oils being cheaper than 5W-30/0W-30 oils. Or does Proton only means lower than 30 weight is not recommended? NVM I'll stick to SC's 5W-30 until next service.

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Added on June 9, 2012, 11:32 pmI use Papago X8.5 and Garmin in my Lokatoo. Much better than stock app.

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Added on June 9, 2012, 11:43 pmBumping my previous home dyno. Guys, be proud our our EB CFE's performance



This post has been edited by taqu: Jun 9 2012, 11:43 PM

I guess it's bcoz 10W-30 oils are cheaper and easier to get around the world

I guess when the engine gets old, thinner engine oils will leak through worn seals & rings. Hence the 10W-30 as "play-safe" recommendation for the next 10 years of ownership. Who knows if Proton also purposely downstate the max torque (220Nm) that our CVT can take to discourage extreme modding.

Just my opinion. I can be wrong though.

Anyone writing email to Proton on this matter? If they say 5W-30 & 0W-30 are NO NO, I can opt for Petronas Syntium 0W-40, whose viscosity sits between 10W-30 and 10W-40.

I thought modern turbo engines no longer require ZDDP level as much as older turbo engines do. And I don't think those thin synthetic engine oils easily break down for turbo applications.