Quote:
Originally Posted by jonmark1985  15w-40 will be fine in the winter, if you have a good battery in your van. I run 3 quarts of 20w-50 and 2 quarts of Lucas in my car all year round and never have any problems. |
If your engine is so worn out that you have to run 20w50 in it, then OF COURSE thick oil isn't going to cause problems!! Unless you have an extremely worn engine that you just want to keep running as long as you can, there's NO earthly reason to use 20w50, or even 15w40, unless of course you have a diesel.
As far a clicking lifters go, I don't know about any damage being done. I've driven cars with clicking lifters over 100,000 miles without issue. The older Oldsmobile engines were notorious for doing it. I've also had a few Ford and Chevy V8's that did it. You can try running the valves or dumping a quart of ATF in the crankcase to try and free them up if they are sticky. I just get used to it since it generally doesn't affect the way the engine runs.
