5W50 or 10W40..??

LiquidZ · 05-28-2010, 08:37 AM

As a rule of thumb, you can increase your viscosity level by 1 ( going from 5W-30 to 5W-40). However, I don't feel comfortable doing this on new engines as their close tolerances might not allow for adequate lubrication with a thicker oil.

Also, there is no such thing as too thin of an oil on startup. Even if you are in Panama where you have really high temperatures, your engine will always pump an oil with a lower "winter" number (the 5 in 5W-30) better. Startup is where a lot of wear occurs as parts aren't fully protected by oil.

So I guess what I'm trying to say is that I see no reason why you shouldn't stick with 5W-30. By going with a high quality synthetic, you'll be more than covered in your application.

370Zsteve · 05-28-2010, 08:38 AM

Redline doesn't market a 5W-30?

Modshack · 05-28-2010, 09:49 AM

Quote:

Originally Posted by LiquidZ

So I guess what I'm trying to say is that I see no reason why you shouldn't stick with 5W-30. By going with a high quality synthetic, you'll be more than covered in your application.

...Stick with the recommended Viscosity...

6MT · 05-28-2010, 03:57 PM

Quote:

Originally Posted by Modshack

...Stick with the recommended Viscosity...

Or let us know how much it costs you to fix the valve train issues.

pty370z · 05-28-2010, 04:23 PM

So pretty much everyone agrees I should stick to 5W30. Red Line does have 5W30 so I'll stick to that. I appreciate your input.

Any comments on the Water Wetter for the cooling system? Thanks again!

05-28-2010, 08:37 AM	#1 (permalink)
LiquidZ A True Z Fanatic Join Date: Nov 2008 Location: Columbus, OH Posts: 1,940 Drives: Mag. Black 2009 370Z Rep Power: 705	As a rule of thumb, you can increase your viscosity level by 1 ( going from 5W-30 to 5W-40). However, I don't feel comfortable doing this on new engines as their close tolerances might not allow for adequate lubrication with a thicker oil. Also, there is no such thing as too thin of an oil on startup. Even if you are in Panama where you have really high temperatures, your engine will always pump an oil with a lower "winter" number (the 5 in 5W-30) better. Startup is where a lot of wear occurs as parts aren't fully protected by oil. So I guess what I'm trying to say is that I see no reason why you shouldn't stick with 5W-30. By going with a high quality synthetic, you'll be more than covered in your application. __________________ Last edited by LiquidZ; 05-28-2010 at 08:48 AM.

05-28-2010, 08:38 AM	#2 (permalink)
370Zsteve A True Z Fanatic Join Date: Sep 2009 Location: Gold Coast CT Posts: 10,599 Drives: 2019 Corvette G.S. Rep Power: 43	Redline doesn't market a 5W-30? __________________ SOLD MY Z MARCH 2018 - another Core OG moves on - new ride 2019 Z Corvette Grand Sport - no mods necessary but already have eyes on HFC and intakes LOL IT NEVER ENDS.

05-28-2010, 04:23 PM	#5 (permalink)
pty370z Track Member Join Date: Apr 2009 Location: Panama City, Panama Posts: 654 Drives: over the speed limit Rep Power: 17	So pretty much everyone agrees I should stick to 5W30. Red Line does have 5W30 so I'll stick to that. I appreciate your input. Any comments on the Water Wetter for the cooling system? Thanks again! __________________ 2010 Solid Red 370Z * *Touring-Sport-6MT Black Interior Performance:** STILLEN * BERK * UR * MISHIMOTO * K&N * Z1 * ZSPEED * UPREV * DBA Interior: GT-R Red Start/Stop Button * MSA Floor Mats * PW:JDM Exterior: INGS+1 * SEIBON * FUJIMURA * PW:JDM * UAM * KICS * VOLK