Stopped in the local auto parts place to pick up some 5W-20 oil for my truck. Noticed there was 0W-20,30 etc.? What I thought I used to know about this was that the "W" indicated winter weight and provided easier starting in cold weather then as engine temp increased, so did viscosity providing better lubrication. I've been using 5W-30 Synthetic in small engines for a long time now even though manual always says 30W. Have had no problems at all. "0W" indicates minimum viscosity or lubrication? Came home and did a search and found different explanations. One said it provided better gas mileage due to better lubrication. The one I was looking at was $15/quart, doubt it increases mileage that much. This is from another article explaining it.
Zero-weight oils are designed to reduce emissions during warm up. If the wrong oil is in the crankcase, it will change the three to five minutes it takes to bring the combustion chamber up to temperature. This will also alter how the variable valve timing works. It can also have implications for the catalytic converter.
Here's the article if anyone is interested.
https://www.underhoodservice.com/understanding-motor-oil-viscosity-zero-weight-zero-problem/
Guess all I'm saying is that I stopped in to buy oil for my truck and discovered that the world had changed while I wasn't looking.
Zero-weight oils are designed to reduce emissions during warm up. If the wrong oil is in the crankcase, it will change the three to five minutes it takes to bring the combustion chamber up to temperature. This will also alter how the variable valve timing works. It can also have implications for the catalytic converter.
Here's the article if anyone is interested.
https://www.underhoodservice.com/understanding-motor-oil-viscosity-zero-weight-zero-problem/
Guess all I'm saying is that I stopped in to buy oil for my truck and discovered that the world had changed while I wasn't looking.
