Whats the thickest sythetic oil i can run on my ls motor with 210,000 km???

 

10 30? correct me if im wrong..but i dont think you would want anything more viscous in ur motor

 

oh synthetic..didnt see that..ummm..bump

 

10W30 is ok cuz its a motor with more km's or miles whatever... but It will be synthetic.. and I'm just wanting tto know what i can use... i work for a motorcycle place.. and they use 5w30 for their primary's... so that goes quick... but then they have like sludge really thick ****.. so i'm just wondering how thick I can go... 1 litre of oil = 4 cdn... so a good deal..

 

ive ran 20w50 im my ls engine before, but the largest i went with all the time was 10w40.