I have been studying oil for about 3 hours today in this section and countless hours over the past week.
When I did an oil change the other day, I put in pennzoil platinum 5w20, a fellow member told me it was too thin for an old engine and recommended a 10w30
I then checked the oil viscosity chart and checked all the oils available in my area. I then decided to stick with the pennzoil platinum but changed the weight to 10w30. the cSt rating for that is 63.4 at 40 celsius and 10.5 at 100 celsius, compared to the castrol "GC" 66.8 at 40 celsius and 12.1 at 100 celsius. Does that mean my oil is thicker or thinner then the "gc".
Based on what I have read on other sites, the lower the cSt you get at each temperature, the more flow you will get because the cSt is based on the time it takes to circulate! Is this correct?
Now people are telling me I went too thick. I am completely confused. I hate to admit it but I caused rod knock on my old supra because I went with an extremely thick oil and I am trying to be extra cautious now.
When I did an oil change the other day, I put in pennzoil platinum 5w20, a fellow member told me it was too thin for an old engine and recommended a 10w30
I then checked the oil viscosity chart and checked all the oils available in my area. I then decided to stick with the pennzoil platinum but changed the weight to 10w30. the cSt rating for that is 63.4 at 40 celsius and 10.5 at 100 celsius, compared to the castrol "GC" 66.8 at 40 celsius and 12.1 at 100 celsius. Does that mean my oil is thicker or thinner then the "gc".
Based on what I have read on other sites, the lower the cSt you get at each temperature, the more flow you will get because the cSt is based on the time it takes to circulate! Is this correct?
Now people are telling me I went too thick. I am completely confused. I hate to admit it but I caused rod knock on my old supra because I went with an extremely thick oil and I am trying to be extra cautious now.