Synthetic oil

[Old120]

Whats the deal with Force. The Operator's Manual for my 1992 Force 120 says- Caution- Never Use Synthetic Oil. I have been using Merc. oil for years . What happens if I change to Syn.

 

[JB]

Re: Synthetic oil

Seals. 1950s technology can't seal synthetics. Forces are 1950s technology.

 

[rbruce63]

Re: Synthetic oil

Synthetic engine oils were developed at the beginning of WWII by the German Army requiring their tanks to start in the cold Russian winter! So synthetics were pre-1950's technology!

 

[JB]

Re: Synthetic oil

I didn't say the oil is new tech. Synthetic lubricants have been around since the 20s.<br /><br />Too bad the Germans didn't build the Force.

 

[lakeman1999]

Re: Synthetic oil

JB does the Force,s being 50's technology, include the late ones built by mercury?

 

[JB]

Re: Synthetic oil

I don't really know, Lakeman. <br /><br />Some materials soak up petro oils and seal them well, but wont do the same with synthetics, so wont seal them. I would compare it to the gasoline/alcohol problem with fuel system materials compatibility. Use the wrong stuff and materials harden, swell or melt.<br /><br />When, or if, the seals in Forces were changed, I don't know.<br /><br />I had a '76 Audi Fox that leaked like the devil when I tried to use Mobil 1 in it. Changed back to Pennzoil and it quit leaking. My '98 ML320 requires synthetics, and using petro oil would void the warranty. It has never had anything but Mobil 1 in it.<br /><br />Maybe one of our fellow members can explain it better.