My Story. I purchased a 2018 F150 5.0 brand new in April of 2019. I used Pennzoil Ultra 5w20 with 6K intervals and mostly Sheetz E-85 because I heard E-85 was cleaner burning than gas but I would occasionally use 93 Octane because I would get 24 mpg vs 18 mpg with E-85.
From day one it would burn a quart of oil every 1K miles but it eventually went to 800 miles then 500 miles. A check engine light came on when I was accelerating hard to get in front of traffic. I took it to the dealer expecting a bad oxygen sensor or a clogged converter.
At 87,000 miles the block was fine and had good compression, but the cylinder heads and cams were toast. The # 3 and #8 spark plugs were worn down and all others had oil in them. The mechanic said the heads looked varnished but he noted the oil change intervals so the heads were replaced under warranty.
So now I am concerned what oil and fuel I should use for the new motor. BTW I babied this truck. I never towed anything and I commute to work 80 miles round trip every day mostly highway. It even has the original front brakes at 88K. I have a 2011 5.0 Mustang I drove hard and it has 145K miles with no issues. The truck currently has OEM 5w20 oil and 93 Exxon in it.
So should I stick with Dino oil and not synthetic? Should I stick with 93 octane and not E-85? Should I lower the intervals to 3K instead of 6K because of the direct injection? Or should I chalk it up that I just got a bad motor from day one and now everything is just fine?
From day one it would burn a quart of oil every 1K miles but it eventually went to 800 miles then 500 miles. A check engine light came on when I was accelerating hard to get in front of traffic. I took it to the dealer expecting a bad oxygen sensor or a clogged converter.
At 87,000 miles the block was fine and had good compression, but the cylinder heads and cams were toast. The # 3 and #8 spark plugs were worn down and all others had oil in them. The mechanic said the heads looked varnished but he noted the oil change intervals so the heads were replaced under warranty.
So now I am concerned what oil and fuel I should use for the new motor. BTW I babied this truck. I never towed anything and I commute to work 80 miles round trip every day mostly highway. It even has the original front brakes at 88K. I have a 2011 5.0 Mustang I drove hard and it has 145K miles with no issues. The truck currently has OEM 5w20 oil and 93 Exxon in it.
So should I stick with Dino oil and not synthetic? Should I stick with 93 octane and not E-85? Should I lower the intervals to 3K instead of 6K because of the direct injection? Or should I chalk it up that I just got a bad motor from day one and now everything is just fine?