Search results

GM uses Forged pistons and they heat up slower causing them to flop around. If the noise goes away in two minutes or less then the tolerences are ok but if it takes more the three minutes then you have a problem. Newer engines have the pistons teflon coated to extend their life span. An engine...

Just a word here about filters. I for one have cut open a few Factory filters and after market filters to find a difference between the two. I have counted the number of pleats in the paper used to filter the oil and always find less pleats in the after market filters. The only other thing I...

OK, Now I understand. I wonder why companies only recomend 5W20 for their engines? I think they are concerned about MPG figures. I don't think 5W50 will hurt any engine though. I know MPG might drop a bit but as long as there is no damage to the engine then it wont hurt. If you can read between...

Hi Mitch. Your figures are a bit technical for me. What I was trying to find out is that both 5W20 and 5W50 are the same thickness when cold and when the oil gets hot the thickness doesn't change, does it? I thought the 50 had more additives to protect as well as a 50W single weight oil at...

OK I'm new here so pardon my spelling. My question is, what is the difference between 5W20 and 5W50 engine oil. From what I have been told the 5W stands for winter flow or cold starting flow rate ( viscousity )and the last number 20 or 50 is the rating for high temperature protection of a single...