mikem1959

iTrader: (2)

My oil seals are wore I guess,it smokes some when I start it cold.I read in here to ad lucas heavy duty oil stabalizer.I also read to run thinner oil(10-30) and the oil seals wil cut the thinner oil easyer to leasen smoke.Who's right 50w with lucas or 10-30?They seem to contridicte.My 85se 13b has fresh 20-50 in it now and is smoking on start up.

LongDuck

5w-20 didn't seem to help with mine, so maybe try the thicker stuff and report back.

Same issue, -SE with 200k miles on it, and worn oil-control seals around mostly the rear rotor. I actually had a hand in wearing them down, as I thought some MMO would help free up the carbon inside the engine, which it did. Unfortunately, it ate up ALL the carbon, including the carbon that was helping to seal the oil control seals!

Summertime very little oil is burned, but the engine never really cools down where I live. Thinner oil allows more of it to get past the seals, so you still get smoke. Thicker oil (with Lucas additive) may help, but I've not gone that route, since a little blue smoke on startup is better than gumming up an engine with a bunch of oil additives, but hey,... that's me.

Let us know what you try and how it works out,

80's old school

iTrader: (7)

I have been using Lucas Engine Seal... It has the same goodies as Lucas Oil Stabilizer but with a conditioner that softens and swells the seals... Seems to have helped a LOT...

I use Walmart 20W50 oil...

Kentetsu

What will sneak past the seals easiest? Something light weight and runny? Or something thick and sticky?

mikem1959

iTrader: (2)

I see your point ken the other post I read somewhere made a good argument as well.He said thicker heavy lets the worn seals glide over the oil film and thinner oil gets cut and repelled.I see wisdom in both.

80's old school

iTrader: (7)

I tend to belive the thicker oil helps... I would really try some Lucas Engine Stop leak....seems to be working..

Kentetsu

That is an interesting thought, and I can see the logic to it. But it does go against all those years of "old timers" knowledge, where they have always gone thicker to control oil seal leakage.

'80s- are you using the Lucas stabilizer, or the block sealer?

I've never tried the block sealer (and unfortunately my oil seals are fine, so I have no excuse to), but those things scare me. I've tried them on piston engines before, never had it work as advertised though. But hey, it's Lucas right? They make good ****.

80's old school

iTrader: (7)

I am using lucas Engine oil seal... it is the Lucas oil stabilizer as a base stock with an additive to help soften and swell up pliable oil seals.... It is not really like restore or other brands like that..

I also use 20-50 walmart oil cause it is cheap....at $8 for 5 quarts, it is one of the last good values out there!

Lemme find that article that was written that states that thinner oil is better because the metal oil seals cut through the thin instead of scating over it... That might be OK ...but I feel my oil control O rings are hard and leaking.....to me....that is where thick oil comes in...

80's old school

iTrader: (7)

http://www.vintagemazda.com/node/585

here is the article...scroll down to "what oil should I use"..... interesting...

wargoblin

Bringing this thread back from the dead for my 2 cents....

I ran 5-w20 Synthetic for the longest time. When I felt my engine was getting older I switched to 20-w50 suddenly my car was smoking a lot on idle, and it only got worse and worse. I took my turbo out thinking that was the problem. Rebuilt it, put it back in. Same problem. Turned out ot be the Oil Control Rings. I never made the connection to Oil weight and the car burning oil. I even used the Lucas Oil Leak Stop to thicken the oil even more on top of running 20-w50. This didn't fix it either, still smokes just as much. I had to connect a vacuum line to the Oil pan to stop the smoking. Which is working fine I guess, but after a few more miles I'm going to switch back to 5-w20 or maybe 10-w20 and see if that reduces or stops the smoking.

80's old school

iTrader: (7)

Tell us more about hooking vacuum to the oil pan... How did you do it? Did it help to reduce oil consumption?

80's old school

iTrader: (7)

Bump.... any ideas??

DivinDriver

iTrader: (15)

Sounds like he had to fabricate a replacement for the stock PCV system.

mikem1959

iTrader: (2)

This crank case vent is interesting,for cars smoking al the time.Mine just does it on start up when oil from sitting has leaked past the seals?I dont think a vent would help this.I have garaged my car for winter to start going thru many minor repairs,so I wont have time now for thick vs thin comparisons.I wonder how rotorys compare with piston eng. on blow by?