Car and Driver octane test

womps wrote:

Copperhead wrote:

Groover wrote:

Bionic Man wrote:
So, did Ford change their recommendation in the owners manual away from premium fuel?

Ford has never recommended premium for the base model Ecoboost engines engines but they have for the high output engines in the Raptor, Limited and Lincoln.

So have they changed, NO. Do they have various recommendations, YES.

See the bottom of the first page in the attachment. Standard Ecoboost on the left, HO version on the right:

2019 F150 specs

Didi you happen to notice that link also shows a recommendation of ULSD up to B20 for the EB 2.7? That one is new to me. The EB 2.7 is a diesel engine? Yet in the same column on that motor, it says it is coil over plug design. A diesel with spark plugs? So it makes the entire specs sheet seem suspect regarding fuel recommendation. Also, it shows the 5.0L as a 12:1 compression ratio. The 5.0 has never been a high compression engine.

Whomever put that sheet together had no clue what they were doing.

What spec sheet are you reading? No where do I read that the 2.7 is a Diesel engine. The 5.0 Coyote V8 does have a 12:1 compression ratio. This information is from the Ford website.

My bad. I read too far down the sheet under the column for the 2.7 and didn't realize I was looking at 3.0 diesel info. Also, the 5.0 Coyote in the F150 has a lower compression ratio of 10.5:1. From a wiki on the subject....

A torque-biased variant of the Coyote is produced as an alternative to the EcoBoost V6 in the new F-150 pickup truck. The F150 5.0L receives a lower compression ratio (10.5:1), intake camshafts with less duration, cast iron exhaust manifolds, and revised cylinder heads