Link is working now.

Yes, link is working. I stand by my reco for M1 0w40 if you can swing it, and with an early filter change as Itslimjim stated.

The one side is definitely far worse than the other. That thing has not been adequately looked after oil-wise.

^Couldn't he manually clean that while the covers are off? I'm sure the combustion chamber/cylinder head area has carbon deposits as well, so my other recommendations still stand. Idle time flushes before draining and within 1-2 years MAX(even if drawn out) and this engine will be looking great.

The one side isn't bad though. What causes the one side to be worse . I just got done cleaning them now I'm going to rough the surface up and sand the tb cover. The guy had proof of oil changes. With pyb and fram filters

PYB and FRAM filters? IMPOSSIBLE! At what intervals?

(this should be good, waiting for the SOPUS "crew")


Was the bad side the side with the PCV valve by chance?

You know, good 'ol Tig and myself have never had this problem with Mobil 1..... LOL!!!

3000 miles and he did have proof. I don't want any sopus fanatics to be upset but really he was pretty good at doing it on time. And yes overkill it was. But the hose is good and the PVC rattles and doesn't look real bad

He could, but then risks breaking off chunks that the oil pump will ingest or could plug up the pick-up screen. Using something like M1 0w40 is going to be more "progressive" IMHO. I know it is expensive

That's the side where all the gasses get drawn up to, so blow-by and vaporized oil are drawn over top of the surface of that cylinder head and some of it condenses and forms what you see built-up there. A good oil will prevent that from occurring, as it will have enough dispersants and detergents to wash off the residue and keep it in suspension until the oil is changed.

The pic of my one high-mileage Windsor that I've posted is the PCV valve side. Draw your own conclusions based on that.

Where is that pic overkill? I wouldnt mind seeing it. Would you say Mobil 1 is my best bet no other synthetic or a Dino ?

This engine has 338,000Km's on it (210,000 miles):



10-12,000Km OCI's on various grades of Mobil 1, the last I used was the 0w40 when it became available. Prior to that it saw everything from 0w20 to 5w50.

Oil filters were K&N or Motorcraft.

This is a 1987 302 from my '87 GT T-Top. The rest of this engine is just as clean. I think the age is relevant.

I'm a bit like Tig (though not as long a time period) but have been using Mobil 1 since my dad started letting me change the oil in our Townie, which was 1994.

In every engine I've ever used it in, the results were always a clean engine.

IMHO, their 0w40 is their flagship product designed for extended-drain Euro applications. It is their most robust formula and subsequently is going to do the most cleaning. THAT would be my suggestion for this application. It isn't going to clean it up over night, but then, you wouldn't want it to. But it will clean it up.

That is clean!!! So I'm guessing you swear by Mobil?

Yeah, pretty easy to see why eh?

I've got two 302's that look like this, both Mobil 1 engines. Both running the same OCI's. It has always worked well for me (like this) and that's why we use it.

I HAVE experimented with other brands (most notably Redline and Petro-Canada) since joining this site, but I always come back to M1. And in applications where I want an approved lubricant (like my M5) there isn't anything else even considered.

What is your oci?

OCI is 10-12,000Km's, which is 6,200-7,500 miles.

Hmm I may shoot for some. Mobil!!! Because this thing looks gross