What is everyone's take on this as far as safe if used alot. I am seeing a chart from edmends that Ford says 2013 on is a "YES" and Ford is Lincoln, but I do not see in my manual and I dont have a gas cap on my 2015 MKC that would say anything about flex. The engine already runs on 10% so adding 5% does not seem like it would be that bad and more octane never hurts especially when 5 cents a gallon less than 87 (what it is in my area). If I saw it and they did have two version and one was 10% I would feel comfortable. There is that AAA warning article you see out there making it sound like that 5% is going to wreck your engine and then many site saying its fine. Heard even better gas mileage, but I would hate to do any damage to the engine as I want to take this car to at least 160K miles. Thoughts on it being safe for the long run (assumes 88/E15 stays around) Anyone been using it exclusively (more than just a few times to compare performance)?
2015 MKC/ 2.3 AWD Platinum White Tri Coat Met. W/White Sands Int., Reserve, 20" Wheels, THX
Last edited by Kyleg; 07-20-2019 at 10:05 PM.