Lead or two stroke oil in the fuel?

No additive is required - loads of threads here over the years explaining why

You have not said where you are located so specific fuel recommendations cannot be given but in general just use the best you can find

 

It's a topic about as much discussed as timing belts...In the following article, you will find reference to an "official advise" (?) from the Factory: scroll down to "Ferrari".
And if you car got cats, you can use unleade fuel.

http://vea.qc.ca/vea/articles/unleaded.htm

 

yes

 

The info in the link is from 1998 and was updated by the factory - just use SHell Vpower (or similar) and stop worrying unnecessarily

 

One comment that I'd make here is that 2-stroke oil may have changed over the years or comes in different flavors. The recent 2-stroke oil that I've used in my lawn string trimmer seems to have a lot of black graphite (?) in it that certainly leaves a dark deposit inside the gascan that I store it in (wouldn't want that in my carb fuel bowls). If you want to add an oil product to the fuel, I'd go with something "cleaner" like Marvel Mystery Oil or a 2-stroke oil that looked more like a translucent amber oil and less like black ink -- just an observation...

 

As far as the valves on a GT4 are concerned, I'd be more interested in the sodium valve issue than worrying about the fuel. The thing has hardened valve seats & so is perfectly OK on unleaded.

It also doesn't have that high a compression ration by modern standards (and probably even lower than book if its never been rebuilt) so its arguable that even a high octane fuel isn't really necessary - but for the difference in cost I'd use one anyway.

 

In my youth -- long before most of you were born -- we used to add Marvel Mystery Oil to the gas tank. Supposedly, it helped lubricate the valves, but who really knew? STP Gas Treatment was a big seller also. When unleaded fuel came around, the big "issue" was that it might burn out the valve seats on older cars. I think it was all a bunch of nonsense, just to sell these additives. I used unleaded in all kinds of old cars and never had a problem.

Today, I try to buy fuel from name brand companies that have additives in the gas, like Shell, Sunoco, BP. I only buy the "no-name" brands when that's all I can find. I do, now and then, add a bottle of Techron, the Chevron injector cleaner, to a tank of gas in all of my injected cars. It does seem to keep the engines running nicely, and it's a lot cheaper than having the injectors removed by a shop and cleaned.

 

Bad , bad logic! Look up the cost of a head and very often a piston. Put the additive issue on the bottom of the list and change the valves out and sleep at night. Try and contact the PO and/or relatives and find out if they have been changed to SS and you may be good to go! Lost

PS not a bad job, the worst part is getting the front header loose and pulling the engine

 

Re Marvel Mystery Oil...unlike 99% of all the liquid junk that is marketed to somehow fix problems without actually doing the work involved to REALLY fix them, MMO is actually the real deal.

It used to have a mil spec number and was used in the military for several different things, including lubricating valves as well as cleaning and as a penetrant. I don't think it's still used in the military but it is still widely used in aviation piston engine work/maintenance.

One thing to be aware of - MMO is an excellent cleaner and can be too good! If you have a lot of deposits in the fuel tank/system, MMO will clean them all. But there is no magic, when they are cleaned these deposits don't change into fuel...they get collected by the fuel filter.

I personally was involved in example of putting some MMO in a fuel tank. Two days later the fuel filter clogged so that the engine would only idle. FOUR new filters, in turn, lasted less than 20 minutes each at normal operating conditions before clogging completely. We ended up having to vacuum the fuel tank in order to clean out all the gunk that MMO had released. So...if you use it in your tank, depending on the condition of the system, you may get a lot more cleaning than you bargained for!

 

No I don't - I have used injector cleaner in the past but don't now. I have renewed my injectors & had my fuel tanks out last year & they were spotless inside. I don't know about the inside of the CIS injection unit but its one of those things I wouldn't mess with & besides, its working just fine as it is

If you think the carbs need cleaning then personally I'd take them off & strip them. Other than that the best thing you can do is get the engine running right & the carbs balanced, stick some new plugs in it & then take it for a good long run down a motorway at highspeed/revs. There's nothing quite like an "Italian tune up" to get it cleaned out & running right. It will also burn all the crap out of the exhaust system

Thereafter just use good quality fuel & drive the thing. About the worst thing you can do is let it sit unused.

 

Following the advice of a K-jet expert, I occasionally put a little two-stroke oil in the fuel to keep the K-jet injectors in good shape, especially just before the car is stored for a longer period. I don't see that it could be any good for the valves and seats. It just burns...

 

Just be careful. Some years ago before the UK had gone completely unleaded, I took my GT4 for a spin down to Italy. Filling up on the autobahns in Germany there was no leaded fuel and on arrival back in the UK the engine was smoking heavily. I'd been running at 100-120mph for a lot of the way.

It required a complete rebuild - heads, pistons, liners etc. I now run it with Tetraboost.

 

Hello!
I have a 328 -86, I have a little two stroke oil in the fuel (V-Power) to lubricate injection and injectors. I hope that the oil lubricates the other parts on the way to the cylinders and prevents gaskets to dry. My Ferrari has not felt bad about it the 3 years I've owned it