Sunday, April 5, 2026

Initial Maintenance - Simple Oil Change

This afternoon, I decided I'd replace the oil in the Mustang despite the knowledge it was replaced not that long ago (81,547 miles on 10/23/24).  When it was replaced, they used a MicroGuard filter so I imagine they used inferior oil too.  It will give me some peace of mind to replace it.  I keep a supply of Valvoline VR1 10w30 for my 1967 Mustang along with several Wix 51515 filters so I had everything I needed to do the job properly.  

The new oil pan looks nice under the car and doesn't appear to be leaking anywhere.  It was installed when the oil was last changed so I don't expect anyone has removed either of the drain plugs.  They were rather hard to loosen as I expect it was likely painted with them in place.  However, that was nothing compared to the effort required to remove the oil filter.  

The oil filter would not budge using a standard oil filter wrench.  I tried a Craftsman rubber strap wrench and that would not work either.  After working with it a while, I hammered a screw driver through the side and was able to loosen it some.  Unfortunately, I had to do that three times and then twist it off with a huge vice grip wrench.  It was beyond ridiculous how tight it was installed.  I'm tempted to keep it as some form of trophy due to the effort involved.

I cleaned up the huge mess I made due to the oil filter and put everything back together.  The mileage is presently at 81,733.  I noticed I need some sway bar bushings and end links so I'll add that to the list of future projects.  I looked around a bit under the car and see some light surface rust to deal with but in general it is in good condition.


Update:  The following morning I walked out to the garage and looked under the Mustang.  I found the oil pan leaks from the back drain plug.  It was already rather tight but I tightened it a bit more but within an hour there was another spot from dripping oil.  I was probably only sealed before due to the drain bolts being painted over when it was made.  


The drain bolt has a simple metal washer rather than something plastic or with a seal.  I stopped at O'Reilly and picked up a set of 1/2 drain washers which have an integrated rubber O-ring (Dorman 097-021CD - shown on right in image below).  It is convenient that it is a two pack as I have two drain plugs.

I swapped them into place, captured the oil in a super clean pan, and then put it back into the car.  I drove it around a bit and will see if we have any leaks this time.



No comments:

Post a Comment

AC Rebuild & 134A Conversion - Part 4

After work the last two days, I accomplished a fair amount on the Mustang.  I'm nearing the final point of both the AC and interior proj...