Heavy Smoking 1979 RX7

Kentetsu · 06-13-2008, 05:03 AM

I used 20/50 Castrol GTX, along with about 1 quart of the Lucas. After that, the only time it would smoke was at races when I would be decelerating from redline or higher. You can see it in some of my videos, and its not much.

What happened was, I used the Haynes manual to find out how much oil for an oil change. The information provided was incorrect (had to look in the back section for updated information to get the correct amount), and as a result I overfilled the system. Everything was fine for a few miles, then I let off the gas to catch my off ramp and all of a sudden I couldn't see anything behind me. The entire freeway had to slow down until the smoke blew off the road.

So, in my experience, overfilling the crankcase will blow out the oil control rings in very short order.

But still, I got another good 20k miles out of her like that thanks to the Lucas...

1988rx7 · 06-13-2008, 08:44 AM

Kentetsu,

First of all thanks for the reply.

As far as oil amount, I used 4 quarts of Castrol GTX 20W50.
Then changed the oil to 10W40 thinking it was too thick. But I had the same results. The problem is intermittent, in one occation as I was ready to go home from work and I started the car with the choke, she started fine no smoke, but I didn't get to the corner when she started smoking. I pulled to the side and turned the car off. I opened the hood and played with the oil metering rod, pushing it up and down several times. Closed the hood and started the car, and believe it or not when I started the car, she smoked while she cleared the engine for about a minute and then no smoke, got home with no problems.
I will try this weekend using the 1 quart of Lucas Heavy Duty Oil Stabilizer and 3 quarts of 20W50 Castrol GTX.
I'll let you know how it goes.
If the oil rings are bad, wouldn't I feel loss in power?
She feels strong as ever.

06-13-2008, 05:03 AM	#1
Kentetsu RCC Contributor Join Date: Feb 2008 Location: Grand Rapids, Michigan Posts: 530 Rep Power: 18	I used 20/50 Castrol GTX, along with about 1 quart of the Lucas. After that, the only time it would smoke was at races when I would be decelerating from redline or higher. You can see it in some of my videos, and its not much. What happened was, I used the Haynes manual to find out how much oil for an oil change. The information provided was incorrect (had to look in the back section for updated information to get the correct amount), and as a result I overfilled the system. Everything was fine for a few miles, then I let off the gas to catch my off ramp and all of a sudden I couldn't see anything behind me. The entire freeway had to slow down until the smoke blew off the road. So, in my experience, overfilling the crankcase will blow out the oil control rings in very short order. But still, I got another good 20k miles out of her like that thanks to the Lucas... __________________ "Learn from the past, or it will become your future...." '85 GS 12a + LSD/Sterling carb/Respeed coilovers/Respeed front swaybar/Respeed adj. rear spring perches/Illuminas/Bilsteins on rear AutoX vids @ http://www.youtube.com/user/Kentetsu1

06-13-2008, 08:44 AM	#2
1988rx7 1988rx7 Join Date: Jun 2008 Posts: 5 Rep Power: 0	Kentetsu, First of all thanks for the reply. As far as oil amount, I used 4 quarts of Castrol GTX 20W50. Then changed the oil to 10W40 thinking it was too thick. But I had the same results. The problem is intermittent, in one occation as I was ready to go home from work and I started the car with the choke, she started fine no smoke, but I didn't get to the corner when she started smoking. I pulled to the side and turned the car off. I opened the hood and played with the oil metering rod, pushing it up and down several times. Closed the hood and started the car, and believe it or not when I started the car, she smoked while she cleared the engine for about a minute and then no smoke, got home with no problems. I will try this weekend using the 1 quart of Lucas Heavy Duty Oil Stabilizer and 3 quarts of 20W50 Castrol GTX. I'll let you know how it goes. If the oil rings are bad, wouldn't I feel loss in power? She feels strong as ever.