I axed Redline Oil not so much because of cost or availability but because I am changing oil more often and I'm more comfortable using the Castrol Edge EP 5w30 in all our vehicles. I did go with Castrol as when I was trying to source M1EP it was more expensive and extremely hard to find consistently. I will say I have noticed all oil is starting to go out. Even the Gumout Regane with PEA is over 5.xx and the shelves seem out often.