Many people with oil consumption issues say it works wonders. Have you had good luck with it?
1. What was the vehicle?
2. What was the issue?
3. What product did you do the soak with?
4. Did it work for you?
Long story but I'll post anyway. The nature for the piston soak wasn't a ring issue so this is probably off-topic.
- 1987 Camaro (see signature).
- Part throttle ping.
- GM Top Engine Cleaner.
- No, it did not.
The details are fuzzy; this was decades ago.
The above was done at the dealership. Must have been around 1990 or thereabouts. The car had ~45k? miles (I didn't keep detailed records back then).
I recall looking at ignition timing, knock sensor, mixture, etc., the basic things one would looking at with no resolution. I began to suspect carbon build-up. My father (always willing to help) called a contact at the dealership and they too suspected carbon build up. Hence, the piston soak.
A few months later, my bound book of TSB's showed up from Helm. Thumbing thru those thick volumes I came across a TSB regarding smoke on start-up with TPI engines. Again, the memory is fuzzy but there might have been reference to light pinging as well.
The TSB described a warped lower intake manifold as the cause, allowing oil from the lifter valley in ingress into the intake. To check for a warped manifold, a few corner manifold bolts were removed and the bolt clearance holes were inspected for "threading". My manifold did show threading in these holes.
Replaced with an Edelbrock 3860 instead of the GM relacement revised manifold. Issue resolved.