What is the best oil leak additive for trucks?

I have a 1981 Ford F-100 6cylinder truck. It seems to have an oil leak somewhere above the oil filter which is on the drivers side. I wiped the outside of the filter clean, then drove the truck for less than an hour. When I parked it back in the yard and popped the hood the top of the oil filter was totally splattered with oil. The whole bottom end of the engine is oily. It does not leak so bad that I can visually spot where its coming from.





Anyone know of any high tech engine sealants or additives that I can add to the crank and try?What is the best oil leak additive for trucks?
Hi,





I would start by replacing the oil filter. I think you might have a damaged seal on the filter. You can fill the filter on the bench with new clean oil, lube the sealing ring and screw it on after cleaning up the oil around the suspect area. I cannot recommend a fix in a can for oil leaks. There are quite a few downsides to such products in my opinion. You risk clogging a key oil passage and may cause more damage to the engine than resolve your problem.





Good luckWhat is the best oil leak additive for trucks?
Yes. It's called replace the leaking gasket.





I know the vehicle is 26 years old, but there isn't an additive on the market that is going to work for long, if it doesn't tear something else up in the process.





Those stop-leak type additives are meant to get you by until you can have a proper repair done. A good guage is if you fill your gas tank up and then use the stop leak, you should have your vehicle in a repair shop before the next fill up.





BTW, that leak is probably coming from the valve cover gasket.
LIKE THESE OTHER GUYS SAID, IT IS ALWAYS BEST TO CHANGE THE GASKETS. IT IS THE BEST FIX. BUT TO FIND OUT WHERE THE LEAK IS COMING FROM, DEALERSHIPS AND SOME OTHER SHOPS HAVE A DYE THAT THEY CAN RUN THROUGH THE SYSTEM AND TAKE A L E D STYLE LIGHT AND PINPOINT EXACTLY WHERE THE LEAK IS. THAT WAY YOU KNOW WHICH GASKET TO CHANGE. MOST ADDITIVES JUST THICKEN THE OIL SO IT IS HARDER TO GET AROUND THE GASKET. AS SOME OF THE OTHER GUYS HAVE SAID IT IS JUST A TEMPORARY FIX TO THE PROBLEM AT HAND. GOOD LUCK
try some bars oil stop leak. next time u change the Oil in that truck use a can of eng restore





www.restoreusa.com





good luck


hope this helps
change the oil and put some 20-50 in it with a can of restore.
Here is a high tech solution for you.





Above the oil filters exist approx 3-4 crankcase covers on the engine block, they are easy to reach. remove them, clean them and the block mounting surface, place new gaskets (they are cheap) and torque to spec. Your oil leak should disappear. The oil pan gaskets are also notorious for ripping on these engines.





Be sure to wet the filter seal ring with oil before torquing down as a dried ring can crack and cause leaks as well. add yahoo.com to my username if you have any more Qs.





Additives are snake oil, if the engine was designed for them , the owner's manual would recommend them. Fix the leak right and you will have a road worthy engine. Don't leave your safety in the hands of people who want to sell you bottles of bandaids. Additives are a multi billion dollar industry. I only use fuel injection cleaner every once in awhile.





Take care.
It sounds like the engine ';side cover'; gasket is leaking. Especially on a truck of that age, and a gasket made out of cork, I would replace the gasket if it were up to me. The gasket is not expensive, nor is the labour to replace it. Those 300 cu. in. inline 6 cylinder engines were one of the best engines for Ford trucks.
your filter is not tight enoughor the old seal is still stuck in side