thick10w30or0w40 for summer 98 corolla

[Garak]

Originally Posted By: drolds
Also a bit of trans fluid will help clean out sludge. Plenty of techs will do this, although it should be kept within reason (e.g. up to a pint).

No, it won't. That's already been discussed here to death. Transmission fluids will do nothing to clean up sludge and are not high in detergent. Plenty of techs might do it, but plenty of techs are wrong. Plenty of techs will also sell you an air filter at every OCI if you want to spend the money.

 

[Cooper]

Originally Posted By: drolds
First, lets solve your problem. Problem: neglected engine w/ sludge build up in the oil system.
1. If you can pull both valve cover and oil-pan and clean them, much sludge will be gone.
2. New PCV valve which is likely clogged due to lack of maintenance.
3. Run a few short OCIs w/ whatever 10W-30 is on sale w/ a can of 10 minute flush at oil chg.
4. Add a pint of transmission fluid to the oil change and drive it.

In a few thousand miles, you will have removed most of the sludge. 0W-40 or 5W-40 may run fine, but thicker oil will not necessarily clean out the sludge.


Items 1 and 2 are okay...

Otherwise, DO NOT LISTEN TO THIS ADVISE!!!

It is BAD advise...