Engine Light On, Reg or Premium Gas

[Capt.Tom]

Originally Posted by The_Breeze

Thank you for posting this. I was using 85 thinking no harm, no foul - and I'm an old gear head! I only go for higher octane in performance cars.

In most of the country 87 is Regular, 89 is Mid grade and 93 is Premium. If Regular where you live is only 85, that could cause knocking when under load.
https://lifehacker.com/what-happens-...our-1785407622

[The_Breeze]

Originally Posted by Capt.Tom

In most of the country 87 is Regular, 89 is Mid grade and 93 is Premium. If Regular where you live is only 85, that could cause knocking when under load.

It surprisingly worked fine. It seemed a little more sensitive to slight grades (downshifting) like it might have been down on power but no knocking. The land was fairly flat. Not completely and not all the time but for the most part. That's why I didn't think much of it.

Mileage:
8.15 Chadron, NE to Kodaka, SD
8.47 Kodaka, SD to Mitchell, SD
8.00 Mitchell, SD to Blue Earth, MN

[Bob Denman]

I wonder if the O.P. ever got this sorted out?

[Norrirn]

Originally Posted by The_Breeze

Thank you for posting this. I was using 85 thinking no harm, no foul - and I'm an old gear head! I only go for higher octane in performance cars.

Be sure to make a distinction between E85, 85% ethanol/15% gasoline, and 85 octane E10, 10% ethanol/90% gasoline. Only Flex Fuel rated vehicles will run on E85.

[The_Breeze]

Originally Posted by Norrirn

Be sure to make a distinction between E85, 85% ethanol/15% gasoline, and 85 octane E10, 10% ethanol/90% gasoline. Only Flex Fuel rated vehicles will run on E85.

85 octane, 10% ethanol
And thanks didn't know what the other signs meant.
My 2004 Ford Ranger Edge is supposedly a flex fuel vehicle. Hmmm...

[IDguy]

Originally Posted by Capt.Tom

In most of the country 87 is Regular, 89 is Mid grade and 93 is Premium. If Regular where you live is only 85, that could cause knocking when under load.
https://lifehacker.com/what-happens-...our-1785407622

85 is regular where elevation is over 3,000 ft. That is a significant part of the west.

It could cause knocking if you descend to sea level.

[The_Breeze]

Originally Posted by IDguy

85 is regular where elevation is over 3,000 ft. That is a significant part of the west.

It could cause knocking if you descend to sea level.

Thank you. I've noticed the further east I go, it's back up to 87.

[The_Breeze]

Originally Posted by Bob Denman

I wonder if the O.P. ever got this sorted out?

As the world turns...

[HarryS]

Originally Posted by IDguy

85 is regular where elevation is over 3,000 ft. That is a significant part of the west.

It could cause knocking if you descend to sea level.

We are at 4000 ft in NM and the regular is 86 octane.

[Capt.Tom]

State octane standards

https://en.m.wikipedia.org/wiki/U.S....tane_Standards

[Bob Denman]

The higher you climb: the less octane you need...

[Capt.Tom]

A good explanation of Octane and conditions that can be caused by using fuel too low in Octane.
https://www.eia.gov/energyexplained/...e-in-depth.php

[wrench33]

Originally Posted by cramar

We have a 2017 Freedom Elite with the V10 engine. The engine light came on and was diagnosed with miss-firing. After taking it in for service everything was cleaned etc but was told that the injectors might have to be replaced and it was because of using regular gas and not premium. I was advised to run injector cleaner (Seafoam) and have done so now with every other fill up, also using premium, doesn't seem to be a problem driving but the engine light stays on constantly even after resetting the computer.
Anyone else experience this problem and what did you do about it??

This was my problem. Engine light comes on at high RPM. I got a wi fi code reader and it showed MULTI CYLINDER MISFIRE . i THINK IT IS CAUSED BY THE rev limiter in the computer . So I got the APP that goes with the code reader and now I clear the code and the engine light goes off. Same code every time P3030 are something close to that. Mine has not done it in awhile.

[Norrirn]

A recurring check engine light is NOT normal.

[EA37TS]

It's not rocket science. If the check engine light is on take the vehicle to a shop and get it checked. Nobody, and I mean nobody, on this forum can troubleshoot a check engine light unless they are physically at the vehicle with the proper diagnostic equipment.

[Bob Denman]

EA is right: long distance diagnosis is a waste of time...