No need for a 50wt on a stock bottom end, especially for a daily driver.

 

Brad Penn

 

From a test I read not terribly long ago, these are the best protecting oils:


10W30 Lucas Racing Only, full synthetic = 106,505 psi
zinc = 2642 ppm
phos = 3489 ppm
moly = 1764 ppm


10W30 Valvoline NSL (Not Street Legal) Conventional Racing Oil = 103,846 psi
zinc = 1669 ppm
phos = 1518 ppm
moly = 784 ppm


10W30 Valvoline VR1 Conventional Racing Oil (silver bottle) = 103,505 psi
zinc = 1472 ppm
phos = 1544 ppm


10W30 Valvoline VR1 Synthetic Racing Oil, API SL (black bottle) = 101,139 psi
zinc = 1180 ppm
phos = 1112 ppm
moly = 162 ppm


30 wt Red Line Race Oil, full synthetic = 96,470 psi
zinc = 2207 ppm
phos = 2052 ppm
moly = 1235 ppm


10W30 Amsoil Z-Rod Oil, full synthetic = 95,360 psi
zinc = 1431 ppm
phos = 1441 ppm
moly = 52 ppm


10W30 Quaker State Defy, API SL (semi-synthetic) = 90,226 psi
zinc = 1221 ppm
phos = 955 ppm
moly = 99 ppm

http://speedtalk.com/forum/viewtopic...1d4896#p378825

 

Even if there's no need for 15-50 it can't hurt right? I use 50 weight if the cars going to get beat on. Otherwise I stick with Mobil 1 10-30.

 

Actually the 15 weight oil low end can create a lot of additional wear and tear at starting up engine. 80% of the wear occurs when you start the engine because the oil is too thick and has to warm-up before it circulates through the engine

 

With my mods I run Amsoil 10W-40 High Zinc

 

There is no Amsoil ZROD 10W-40. There's only 10W-30 and 20W-50.

 

There is a "high zinc" 10w-40 Amsoil oil, not a "z-rod" though..


"AMSOIL High Zinc Oil Recommendations Phosphorus Level (ppm) Zinc Level
(ppm)
Z-ROD™ 10W-30 Synthetic Motor Oil (ZRT)
1320
1440
Z-ROD™ 20W-50 Synthetic Motor Oil (ZRF)
1320
1440
Premium Protection 10W-40 Synthetic Motor Oil (AMO)
1265
1378
Premium Protection 20W-50 Synthetic Motor Oil (ARO)
1266
1379
Series 3000 5W-30Synthetic Heavy Duty Diesel Oil (HDD)
1266
1379
15W-40 Synthetic HeavyDuty Diesel and Marine Motor Oil (AME)
1267
1377
Dominator® 5W-20 Synthetic Racing Oil (RD20)
1424
1575
Dominator® 10W-30Synthetic Racing Oil (RD30)
1424
1575
Dominator® 15W-50Synthetic Racing Oil (RD50)
1424
1575
SAE 60 Super Heavy Weight Synthetic Racing Oil (AHR)
1265
1375" amsoil.lube-direct.com

 

Aaah okay, thanks for clearing that up for me.

 

Castrol edge sport 10W-60 fully synthetic.

 

I personally use 10-30 signature amsoil

 

I run Mobil 1 Full Synthetic 10w30

 

mobil 1 10w30 in the summer, 5w30 in the winter..