I will see if thicker oil help any, or i will do the RMS this winter
MMO won't make a seal leak unless gunk was the only thing holding in the oil. You can try stop leak or heavier oil but you may be circumnavigating the real issue. The issue is most likely that your seals need replacing. My seals leak bad but it doesn't bother me as its parked in the back yard and it forces me to keep adding fresh oil I work on a lot of jeeps and pretty much every one I've ever seen leaks. When you finally decide to do it, go ahead and do your intake and exhaust as well as timing gasket. If you have more than 30,000 since timing set change, do that as well. Its cheap and your engine will love you for it. Cheers!
1974 CJ5 all stock except for Rocky Road SOA
Completely for hunting - not for show or rock climbing
Ahh, the old "mechanic in a can" trick. I have never used any Lucas product, but it can't be much different the the old standby, when you don't have time or money to repair it right, you pour in a can of STP oil Treatment.
Used to call this stuff, STP, Stay Together, Please or Stop The Puddles. It has the viscosity of bee's honey, on a cold morning, only thicker.
It won't fix the problem, only prolong the inevitable. Normal oil pressure for a stock, used, 258, is about 7 psi to 20 psi. Before I rebuilt mine, that is what I was seeing on a mechanical oil pressure gauge.
After my rebuild and a Melling High Volume oil pump, on startup, I see 70 psi and it will drop down to about 60 psi in a few seconds. When warm, and at hi way speed, I see 50 psi and around 20 psi at idle.
As for the viscosity of the oil, living in the South, I use 30W HD "high detergent" oil. Multi-viscosity oil is great also, but I find the the 30W HD oil keeps the inside of the engine cleaner and I change the oil regularly.
STP and Lucas oil treatment products are still on the market and selling well. So is radiator stop leak, power steering stop leak, engine oil stop leak, etc.
STP is one of the reasons my engine is still run'n strong at 118K miles and 28 yrs of age. Never been inside except to reseal the valve cover(twice).
STP adds Zinc(ZDDP)to the oil, to boost oil film strength. Like oils from the 60's and 70's had to begin with.
Bob the Oil Guy's oil forum used to (!) have a webpage and video that very handily shot holes how well Lucas Oil Stabilizer worked. What the video showed was that adding Lucas Oil Stabilizer to gear lube caused it to trap air & turn into a light-brown colored foamy mess when the gears were spun. The gear lube was its normal dark green until the gears were cranked with the Lucas Oil Stabilizer product in it... it turned light brown/tan-colored due to the presence of the air bubbles. Gear lube is not supposed to foam in use, the bubbles are voids where the lubricant can't be.
Well guess what happened... Lucas became a Vendor/sponsor of Bob the Oil Guy's forum several years ago and Bob immediately removed the webpage and video showing how bad Lucas Oil Stabilizer is. No doubt Lucas' Bob is the Oil Guy forum Vendor fees are more than offset by the increased sales of Lucas Oil Stabilizer.
I can tell you for sure that their engine oil stop leak works
I use in my Jeep, the front and rear main seal leaks have stopped.
I also use it in my Chev 1T Dually with the Big Block eng, and it stopped the well known big block leaks.
The power steering stop leak has worked for over 10 yrs now to stop a power steering bx leak in my Jeep.
Can't find any fault with that..........