1989 F150 Extended Cab Fuel Tank Capacity

5

Asked by Jul 26, 2016 at 10:09 AM about the 1989 Ford F-150 XLT Extended Cab SB

Question type: Maintenance & Repair

I am the original owner of a 1989 Ford XLT Lariat F150 extended cab (it does
not have the long bed).  It has two fuel tanks.  How many gallons of fuel do the
tanks hold?  I want to begin adding Marvel Mystery Oil to the fuel tank but am
unsure how much to add.

I found the old brochure on my truck, but it does not give me a great deal of
information.  This is what I found, but I am unsure of the accuracy for my
particular model:

Fuel Tank Capacity
(gal)

Reg Cab:  SWB Std.  18.2;  LWB Std 19.

Super Cab:  SWB Std. 34.7;  LWB Std 37.2

I am unsure what SWB Std. and LWB Std. mean.  Something about the bed
size??

1 Answer

27,815

lenght from front axle to rear axle.. 10 oz for 18 gallons...

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