Can a bad Oil Filter Cover Gasket cause bad gas mileage? - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars
Ford Forum Ford Forum

» Auto Insurance
» Featured Product
ยป Wheel & Tire Center

Go Back   Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > Ford Trucks | Utes | Vans |SUVs | Crossovers > Ford Expedition Forum | Lincoln Navigator Forum
Register Home Forum Active Topics Photo Gallery Auto Loans Garage Mark Forums Read Auto EscrowInsurance

Ford Expedition Forum | Lincoln Navigator Forum Forum for discussion of the Ford Expedition and Lincoln Navigator.

FordForums.com is the premier Ford Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 03-12-2013, 16:45   #1 (permalink)
Registered User
 
Join Date: Jul 2012
Posts: 6
Can a bad Oil Filter Cover Gasket cause bad gas mileage?

I am having pretty bad gas mileage, and I know that's normal for a 5.4 V8 but it seems worse than usual.

I have oil in my coolant, believed to be from an oil filter adapter gasket. I doubt it's a blown head gasket because the truck is running fine.

My only question is, does this affect gas mileage?

1998 Ford Expedition 2-wheel drive, 5.4L V8.

Thanks guys.
Acrilyc is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 03-12-2013, 17:20   #2 (permalink)
2002 F150 XLT
 
Bert's Avatar
 
Join Date: Nov 2008
Location: Oregon
Posts: 9,658
Re: Can a bad Oil Filter Cover Gasket cause bad gas mileage?

I don't think so.
__________________
Bert
Bert is offline   Reply With Quote
Old 03-12-2013, 17:26   #3 (permalink)
Registered User
 
Join Date: Jul 2012
Posts: 6
Re: Can a bad Oil Filter Cover Gasket cause bad gas mileage?

Quote:
Originally Posted by Bert View Post
I don't think so.
Dang.

I was hoping you'd say yes. But I guess I'll actually see once it's fixed.
Acrilyc is offline   Reply With Quote
Old 03-13-2013, 04:33   #4 (permalink)
Moderators
 
Join Date: Apr 2007
Location: Scotland
Posts: 9,142
Re: Can a bad Oil Filter Cover Gasket cause bad gas mileage?

Only possibility could be if oil was getting on to plug / wire/ coil and causing it to short out .Otherwise very unlikely .
R.S.LOGAN is offline   Reply With Quote
Old 03-23-2013, 17:43   #5 (permalink)
canuck
 
360ci's Avatar
 
Join Date: Nov 2007
Location: Waterloo
Posts: 2,474
Re: Can a bad Oil Filter Cover Gasket cause bad gas mileage?

I'd run a compression test just to make sure. The 5.4L engine is very hearty. I'm not familiar with the layout of the oil filter, but it should be connected to the block, if it's been relocated with a kit, there is still no coolant involvement.

You can test your coolant for ph balance, and pressure. The oil you see might be rust, or a mix of things. When coolant starts to turn brown, it's knowingly been neglected and the heater core is generally the first thing to start to rust. Best thing is to back flush the system. If you're certain there is oil in the coolant, then I would strongly advise a compression test to be certain the head gasket is OK. The 5.4L also protects itself from coolant loss/overheating under most circumstances. As said, it's a hearty engine and you don't want to be out somewhere only to find out the hard way that the head gasket is the source of the problem.

Also, keep in mind that the engine oil is under a higher pressure than the coolant. In some cases the head gasket will mix coolant into the oil.
__________________
'00 Durango R/T 360ci 290hp (modded); 138,500m
'06 Pontiac G6 GT 3.5L 220hp; 44,000m
'12 Chrysler 200 Limited 3.6L 283hp; 13,000m
'99 Taurus 3.0L 2V Vulcan 145hp; 154,300m - Traded
Amsoil in all vehicles!
360ci is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

  Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > Ford Trucks | Utes | Vans |SUVs | Crossovers > Ford Expedition Forum | Lincoln Navigator Forum



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Powered by vBadvanced CMPS v3.2.2

All times are GMT -7. The time now is 09:06.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.6.0
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.