thatguy383

iTrader: (1)

that's the combo i run basically


(excuse crankiness of last post)

ljpzap

So in the end it sounds like either 5/30 or 10/30 but most posts seem to be using synthetic vs. conventional. Just curious if anyone is using conventional. Also in summary which seemed to quiet the "ticking" noise the best? 10/30 synthetic M1 or Penz-Platinum?
Just picked up an 02 35'th anniversary convt with 14k miles and will make first oil change. Thanks for input

mjs1012

iTrader: (36)

on my old motor with 226k i ran conventional castrol gtx 5w30 and never had any issues or ticking.

Speed Freek

iTrader: (2)

Rotella 5-40 synthetic all year, but we dont have seasons in So cal.go on Bob the oil guys website and look it up, best stuff around..

RPM WS6

iTrader: (3)

I would use either a w30 with the oils on the "thicker" end of a 30, or a w40 with the oils on the "thinner" end of a 40. 0w will give best cold start protection.

I like M1 0W40. It's all I use in LS1s. Some people like other oils that are harder to find. I don't like hunting for oil, it's bad enough that I already have to do that with my old flat tappet SBC to get proper ZDDP content.

roninsonic

iTrader: (3)

This is the oil I've been running for the past 1.5k miles or so... No piston slap when cold, doesn't burn any, and I actually gained MPG over Mobil1 5w30.

FiredUpZ28

10W40 M1 High Mileage here. 134K LS1 with a little piston slap and bottom end noise. Still holding up strong, great oil pressure. Changed every 5k and topped off as needed. Sits in a garage November to February so seldom drives cold.

Furious1

iTrader: (1)

I also use German Castrol 0w-30. Works great.

pferris

iTrader: (2)

5w30 is what i run

Cooper85

i use 5w30 royal purple because it protects bestin the long run. even when your oil is low its still protecting like a floyd meaweather oil... royal purple all day every day, take my word guys...