I have a Bronco that sits all week and is only driven on weekends. I've often wondered how much oil is left on the critical surfaces after a week of sitting, and then a "dry" start-up.
It's been stated here that synthetic oil has a "polar affinity" to the metal, and clings to the parts. My thinking is that because syn flows better, it will also drain better, and drain off the engine surfaces.
Since dino molecules have longer chains than syns, does this mean that dino oil also has a higher surface tension than syn (given the same weights)? The higher surface tension would help it to cling to bearing surfaces rather than drain off.
I'm thinking that the dino oil with higher surface tension would protect better upon start-up than would syn oil with (higher) polar affinity.......?
Thanks for all your opinions.
Don
It's been stated here that synthetic oil has a "polar affinity" to the metal, and clings to the parts. My thinking is that because syn flows better, it will also drain better, and drain off the engine surfaces.
Since dino molecules have longer chains than syns, does this mean that dino oil also has a higher surface tension than syn (given the same weights)? The higher surface tension would help it to cling to bearing surfaces rather than drain off.
I'm thinking that the dino oil with higher surface tension would protect better upon start-up than would syn oil with (higher) polar affinity.......?
Thanks for all your opinions.
Don