5W50 or 10W40..??

pty370z · 05-25-2010, 03:15 PM

Hi guys,

I'm getting close to the time of my second oil change. So far I've been using the oil the dealer has (Castrol Synthetic 5W30). I am planning on switching to Red Line Oil but can't decide between 5W50 or 10W40.

According to Red Line, 5W50 is popular in high performance engines on high temperature climates. I understand 10W40 is to be used in high temp. climates as well and when you "abuse" the car.

I live in Panama, Central America. Average temps. are always between 85F-90F year-round. I sometimes do engage in some aggressive driving but never track the car... This is also my daily driver.

I have my mind set on Red Line, just not sure whether to go 5W50 or 10W40 in my specific case.

I already got a FilterMag SS250, a Project Kics Magnetic Oil Drain Bolt, and a K&N HP-1008 filter waiting for the next oil change. Only deciding on the motor oil itself.

On another note, I'm also planning on adding Water Wetter to my cooling system. Any guidelines on what's the correct procedure on this..?? I know I need to flush everything out but what quantities of water wetter and how much water..??

I appreciate any help I can get! Thanks again!

05-25-2010, 03:15 PM	#1 (permalink)
pty370z Track Member Join Date: Apr 2009 Location: Panama City, Panama Posts: 654 Drives: over the speed limit Rep Power: 17	5W50 or 10W40..?? Hi guys, I'm getting close to the time of my second oil change. So far I've been using the oil the dealer has (Castrol Synthetic 5W30). I am planning on switching to Red Line Oil but can't decide between 5W50 or 10W40. According to Red Line, 5W50 is popular in high performance engines on high temperature climates. I understand 10W40 is to be used in high temp. climates as well and when you "abuse" the car. I live in Panama, Central America. Average temps. are always between 85F-90F year-round. I sometimes do engage in some aggressive driving but never track the car... This is also my daily driver. I have my mind set on Red Line, just not sure whether to go 5W50 or 10W40 in my specific case. I already got a FilterMag SS250, a Project Kics Magnetic Oil Drain Bolt, and a K&N HP-1008 filter waiting for the next oil change. Only deciding on the motor oil itself. On another note, I'm also planning on adding Water Wetter to my cooling system. Any guidelines on what's the correct procedure on this..?? I know I need to flush everything out but what quantities of water wetter and how much water..?? I appreciate any help I can get! 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