As many of you have read my previous posts of my motor smoking underdecceleration, i have finally solved the problem. My motor was consuming up to 3 litres of oil in less than a week and a half.
i tried Mobil 1 5w50 twice and in under 2 weeks on both changes 3 lires were missing from the pan. redline 5w30 did the same, and so has RP 15w40.
My motor was smoking under decceleration especially when spun up to 8000 rpm (388ci LT4 corvette) and the throttle was shut. I thought it was the oil. I swiched to redline 5w30 from mobil just to see if I could free up some hp and that's when i noticed the smoke.
1. my clearances are tighter than stock so the motor didn't require a thicker oil.
2. the rings are fine as there was no smoke under accelereation.
The problem? The PCV !!!!! We pulled the pcv tube off the throttle body the other day and oil just poured out from within it. I went for a drive on the highway and went WOT from 2-4th gear and let it deccelerate from 275 km/hr in 4th and slowed to a stop. I pulled the pcv tube from the throttle body and to my amazement it seemed like the entire tube was full of oil and it spilled all over my motor.
Under deccel with the throttle shut the pcv was sucking all the oil out of my valve cover and coating the inside of my intake manifold. Since then i've put on a breather and plugged the throttle body and my motor hasn't consumed any oil. it also doesn't smoke under deccel anymore.
i tried Mobil 1 5w50 twice and in under 2 weeks on both changes 3 lires were missing from the pan. redline 5w30 did the same, and so has RP 15w40.
My motor was smoking under decceleration especially when spun up to 8000 rpm (388ci LT4 corvette) and the throttle was shut. I thought it was the oil. I swiched to redline 5w30 from mobil just to see if I could free up some hp and that's when i noticed the smoke.
1. my clearances are tighter than stock so the motor didn't require a thicker oil.
2. the rings are fine as there was no smoke under accelereation.
The problem? The PCV !!!!! We pulled the pcv tube off the throttle body the other day and oil just poured out from within it. I went for a drive on the highway and went WOT from 2-4th gear and let it deccelerate from 275 km/hr in 4th and slowed to a stop. I pulled the pcv tube from the throttle body and to my amazement it seemed like the entire tube was full of oil and it spilled all over my motor.
Under deccel with the throttle shut the pcv was sucking all the oil out of my valve cover and coating the inside of my intake manifold. Since then i've put on a breather and plugged the throttle body and my motor hasn't consumed any oil. it also doesn't smoke under deccel anymore.
