I was at a local oil distributor for work yesterday and they had Shell 15w50 and Phillps 66 XC 20w50 and 25w60. I was talking to the counter guy and said it was about $25-30 per gallon depending on the brand and weight. He stocks it for some of the local people in a flying club. He was talking about how unique the oil formulations are due to having to protect at high altitudes. He said they are all
Does anyone have experience with this oils? How much different are those multigrades than compared to PCMO? What do the additive packages look like? Do they use the same type of base oils? How does the pressure differences at 35,000ft change the oil properties?
Does anyone have experience with this oils? How much different are those multigrades than compared to PCMO? What do the additive packages look like? Do they use the same type of base oils? How does the pressure differences at 35,000ft change the oil properties?