Fuel in oil

[Wade]

You folks that are having "fuel in oil" issues, what fuel (Brand and Octane) are you using?

The reason I ask is I was reading up on how the knock detection system works in the ecoboost and I am wondering if the fuel in the oil has some connection with fuel grade.

I've been running 91 octane in our Ranger, with no fuel dilution issues.

I'm using 91 octane ethanol free fuel. Occasionally 93 from other stations. Right now I'm hoping the injectors have fixed the issue for me. Finishing a road trip today and I'll feel confident after that.

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[N. J. Jim]

I'm using 91 octane ethanol free fuel. Occasionally 93 from other stations. Right now I'm hoping the injectors have fixed the issue for me. Finishing a road trip today and I'll feel confident after that.

87 octane, Mobil 1 5/30 oil!!

 

[HenryMac]

I'm using 91 octane ethanol free fuel. Occasionally 93 from other stations. Right now I'm hoping the injectors have fixed the issue for me. Finishing a road trip today and I'll feel confident after that.

Have you always used premium in your truck?

 

[MotoWojo]

You folks that are having "fuel in oil" issues, what fuel (Brand and Octane) are you using?

The reason I ask is I was reading up on how the knock detection system works in the ecoboost and I am wondering if the fuel in the oil has some connection with fuel grade.

I've been running 91 octane in our Ranger, with no fuel dilution issues.

I have always run 87 octane. Truck runs great other than making it's own oil.

 

[N. J. Jim]

I have always run 87 octane. Truck runs great other than making it's own oil.

Just for everybody's information on this thread, my oil was at top hole drained a little at a time got down to the top hash fill mark. Let sit and checked again right at fill mark. Drained in measured container and got 16 Oz's.

 

[Brisko_Michigan]

I’ll throw my hat in this unfortunate ring. Oil change last week at 4,000.

Checked it today - wreaks of gas and is at slightly elevated levels. April 2019 engine build, if that’s still a consideration here.

Will keep checking, and our driveway isn’t the most level place to check, but I suspect it’s bound for another visit to the dealership.

Appreciate the insights above. May help in discussion with the dealership.

 

[HenryMac]

I’ll throw my hat in this unfortunate ring. Oil change last week at 4,000.

Checked it today - wreaks of gas and is at slightly elevated levels. April 2019 engine build, if that’s still a consideration here.

Will keep checking, and our driveway isn’t the most level place to check, but I suspect it’s bound for another visit to the dealership.

Appreciate the insights above. May help in discussion with the dealership.

What brand and octane fuel are you running?

 

[jsphlynch]

I've been checking almost daily (always in the morning) for a couple weeks and the level has been high, but stable. This morning I pulled off the extra (maybe a cup), and I'll keep watching it. Did a blot test on the stuff I pulled off and it looks fine, so maybe it was only high because i somehow managed to overfill it when I did the oil change.

Update: Since the level has been stable, I've been checking a lot less frequently. I did check this morning, and it's sitting exactly at the top hole, just as I left it when I pulled off the extra. Interestingly, I checked it a couple weeks ago in the driveway (bit of an uphill slope) and it was actually down a little bit, though that could easily be explain by the slope I was parked on.

I'm running regular 87 octane from a variety (Shell, BP, Marathon) of Top Tier stations.

Background (this is all earlier in the thread, but added here just so you don't have to go back through the thread to remember any details of my case): Did first oil change at 2000 miles, at which point oil was slightly above the top hole, just like it was when I first checked the level at under 1000 miles. Blackstone report came back at 6% dilution, but nothing abnormal on the wear metals. Had dealer look at it when I was in for unrelated warranty work; they didn't find anything amiss but told me to keep an eye on it.

 

[Brisko_Michigan]

What brand and octane fuel are you running?

Hi John, was running Mobil’s 85; cheapest. Reading this string, and in particular your insights, I gather that’s not been the best choice.
You think that could be a contributing factor?

We’ve had the Ranger for two months; two weeks of which it sat at the dealer (separate post on software update issue). We’ve only put 200 miles on it since purchase. Prior to which it sat at a dealership for six months. Recent oil change (20 miles ago) was the first for the truck.

I believe the remaining ca 4000 miles were put on during transport from Canada (originally sold there); it was a dealer-to-dealer purchase.

Thank you for replying.
-Chris

 

[Gizmokid2005]

Hi John, was running Mobil’s 85; cheapest. Reading this string, and in particular your insights, I gather that’s not been the best choice.
You think that could be a contributing factor?

We’ve had the Ranger for two months; two weeks of which it sat at the dealer (separate post on software update issue). We’ve only put 200 miles on it since purchase. Prior to which it sat at a dealership for six months. Recent oil change (20 miles ago) was the first for the truck.

I believe the remaining ca 4000 miles were put on during transport from Canada (originally sold there); it was a dealer-to-dealer purchase.

Thank you for replying.
-Chris

You should definitely not run 85, the minimum per ford is 87. I've always been running 91 (highest in CA), but I would never go below 87.

 

[Brisko_Michigan]

You should definitely not run 85, the minimum per ford is 87. I've always been running 91 (highest in CA), but I would never go below 87.

Appreciate it. Seems Ford recommends same (87+).

Admittedly we didn’t give it much thought (I’m not the primary driver; will flag to the household); have been running 85 in the F150 without issue.

Will Low octane levels lead to tangible blow-by? Assume so based on above.

 

[HenryMac]

Appreciate it. Seems Ford recommends same (87+).

Admittedly we didn’t give it much thought (I’m not the primary driver; will flag to the household); have been running 85 in the F150 without issue.

Will Low octane levels lead to tangible blow-by? Assume so based on above.

That's what I am wondering.... and it's why I asked what octane fuel folks are running that have the "fuel in oil" issue.

Read this.. http://stratifiedauto.com/blog/how-the-knock-detection-system-works-in-the-ecoboost/

and this.. https://www.cobbtuning.com/ford-ecoboost-and-the-octane-adjust-ratio-monitor/

 

[2ford]

What brand and octane fuel are you running?

I use 91 octane since purchase and first oil change using mobile 1 annual. Just under 6k miles and last time I checked the oil level strong raw gas odor but no noticeable increase in crankcase

 

[Brisko_Michigan]

That's what I am wondering.... and it's why I asked what octane fuel folks are running that have the "fuel in oil" issue.

Read this.. http://stratifiedauto.com/blog/how-the-knock-detection-system-works-in-the-ecoboost/

and this.. https://www.cobbtuning.com/ford-ecoboost-and-the-octane-adjust-ratio-monitor/

Interesting. Thank you.

 

[N. J. Jim]

Interesting. Thank you.

Something I don't get tho, if 91 octane is the answer why didn't i start having trouble earlier. I didn't start having a rise in oil level till I hit 7,600 miles and I ran 87 octane from the start. I'll give 91 a shot tho!!

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