Ok, new here and read for days for answers before posting. I have better understanding but need some clarification.
Engine is basically an 11:1 427 L88 with some head work and a modern flat tappet Comp Cam. It is a healthy engine that runs 12:40's in street trim on street tires.
Anyway, I bought as is and it ran great. Never runs hot or any other oil issues. I read all the Zinc threads and ran out and bought some Rotella 15-40.
I noticed car was hard to turn over and almost straining starter. I spent days thinking by coincidence I had a starter issue. I used a meter and now know the draw of every part of the system. It is fine. The lugging is exaggerated when the car sits. If the engineis warm or at temp it rolls right over. The lugging happens even if it is 80 deg and it is the first start.
I had a BMW and had left over 5w-20 or 30?(forgot) BMW oil. I emptied my new Rotella and poured in the BMW oil.
The engine now spins freely again at start up. I live in SOCAL so we aren't talking about freezing weather here.
Question I have is I know going from a 10-5 or 0 will help with colder temps but does it also help with say initial start in average temps? Will a 10w-30 have the same (less honey) less starting friction?
I don't want to get into the whole zinc? deal so I am trying to concentrate of what weight oil I should be getting without going too thin? I know technically a 10w dino would be thicker then a 10w syn correct?
I just don't want to keep throwing out oil. 10W-30 SYN?
Thanks and sorry for long thread.
Engine is basically an 11:1 427 L88 with some head work and a modern flat tappet Comp Cam. It is a healthy engine that runs 12:40's in street trim on street tires.
Anyway, I bought as is and it ran great. Never runs hot or any other oil issues. I read all the Zinc threads and ran out and bought some Rotella 15-40.
I noticed car was hard to turn over and almost straining starter. I spent days thinking by coincidence I had a starter issue. I used a meter and now know the draw of every part of the system. It is fine. The lugging is exaggerated when the car sits. If the engineis warm or at temp it rolls right over. The lugging happens even if it is 80 deg and it is the first start.
I had a BMW and had left over 5w-20 or 30?(forgot) BMW oil. I emptied my new Rotella and poured in the BMW oil.
The engine now spins freely again at start up. I live in SOCAL so we aren't talking about freezing weather here.
Question I have is I know going from a 10-5 or 0 will help with colder temps but does it also help with say initial start in average temps? Will a 10w-30 have the same (less honey) less starting friction?
I don't want to get into the whole zinc? deal so I am trying to concentrate of what weight oil I should be getting without going too thin? I know technically a 10w dino would be thicker then a 10w syn correct?
I just don't want to keep throwing out oil. 10W-30 SYN?
Thanks and sorry for long thread.