The Ford Barn

Ownley1 · 06-01-2026, 11:55 PM

Sponsored Links (Register now to hide all advertisements)

Take a look at this oil report I just got back. Is it time to rebuild the engine?

Blackstone.pdf

Here's the background I sent them:

The heads were rebuilt 2,372 miles ago due to a burnt valve. After re-assembly I ran it for 16 miles on the old oil then 1,004 miles on the first (2021) sample that I sent in. After I sent that sample in I changed the oil and added 395 miles and sent the second (2023) sample in. I changed the oil after 79 miles, then added 656 miles at which point I added 1/2 quart of Lucas Hot Rod 20W-50 make-up oil (I only chose this weight because it was what I had around). Then I added 222 miles which gets us to today. I do not use leaded fuel or a lead additive, just Sta-bil 360.

The odometer shows 14,180 miles (rolled over at least once). It’s hard to estimate mileage on the short block/bottom end. The cylinder walls had good crosshatching, but the spark plugs get oily so I assume it is burning some oil. Based on the condition of the paint I’m assuming the car went through a somewhat cheap restoration in the 1980s and the engine may have been rebuilt at this time. The cylinders were stamped .040 so it’s definitely been rebuilt. The casting number on the block and the engine color leads me to believe it may have started life in a Ford pickup or was a replacement motor from Ford back in the day.

I sampled through the dip stick after a thorough drive then sitting for about 30 minutes.

I am open to increasing the viscosity to 20W-50 if that would help with wear, etc.

06-01-2026, 11:55 PM	#1
Ownley1 Junior Member Join Date: Jan 2025 Posts: 2	Oil Report-Time to Rebuild? Sponsored Links (Register now to hide all advertisements) Take a look at this oil report I just got back. Is it time to rebuild the engine? Blackstone.pdf Here's the background I sent them: The heads were rebuilt 2,372 miles ago due to a burnt valve. After re-assembly I ran it for 16 miles on the old oil then 1,004 miles on the first (2021) sample that I sent in. After I sent that sample in I changed the oil and added 395 miles and sent the second (2023) sample in. I changed the oil after 79 miles, then added 656 miles at which point I added 1/2 quart of Lucas Hot Rod 20W-50 make-up oil (I only chose this weight because it was what I had around). Then I added 222 miles which gets us to today. I do not use leaded fuel or a lead additive, just Sta-bil 360. The odometer shows 14,180 miles (rolled over at least once). It’s hard to estimate mileage on the short block/bottom end. The cylinder walls had good crosshatching, but the spark plugs get oily so I assume it is burning some oil. Based on the condition of the paint I’m assuming the car went through a somewhat cheap restoration in the 1980s and the engine may have been rebuilt at this time. The cylinders were stamped .040 so it’s definitely been rebuilt. The casting number on the block and the engine color leads me to believe it may have started life in a Ford pickup or was a replacement motor from Ford back in the day. I sampled through the dip stick after a thorough drive then sitting for about 30 minutes. I am open to increasing the viscosity to 20W-50 if that would help with wear, etc.