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Thanks for the welcome(s). I've actually been hanging around for some time; just don't sign in often. When I noticed the flow difference in the oils it just occured to me to wonder if the Havoline's shorter "hang time" , as Gary Allan put it, indicates that the Havoline is "heavier", "thicker"...

Yeah, I've always ( 45+ years of oil changes ) been cursed with noticing trivial stuff like this. Now that I think about it though, I don't have to clean off the crossmember when I'm draining the Havoline; that might qualify as significant.

I have a 2006 Dodge Grand Caravan, 3.8 engine and have used Motorcraft, Havoline and Exxon Superflow, 5W-20 at 4-5k mile OCI's with NAPA Pro Select filters over the past 2 years. Always fully warm the engine and ambient air temperatures are consistent. This particular vehicle has a crossmember...

Thanks to everyone who responded to this thread. It's good to understand how the auto mode works when it's in charge and even better to have a manual mode for when you want to be in charge.

Yeah, Squishy understands.

Yeah,I don't doubt that it has all those features in automode. My point is that they can be defeated and the system "put to sleep", by manually turning on the air conditioning and then turning it off so that it functions just like a traditional manual HVAC system except with the auto temperature...

Well, here is what I know now. I took the van back to the dealer and said, "How about humoring me and having an HVAC tech check my system?" After telling me again it was normal for the system to cycle the compressor while in manual mode, he said ok, we'll look at it. The result of that was that...

Thanks for the reply. Could be that I suppose. I wonder, though, because I'm fairly sure this is a recent development. The van has 30k miles and I usually get attuned to how a car is behaving and it's noticable when something changes. I'll experiment a bit with fan and vent settings and see what...

I have an '06 Grand Caravan ( still under warranty )with the automatic Climate Control system. Recently I have noticed the air compressor cycling when the system is in manual mode ( non-auto mode ) without the air conditioning or the defrost switched on. I hadn't encountered that before. In...

This sounds like a problem I had in a '94 Dodge Caravan. I tried all the fixes you mentioned and nothing worked. Finally I took off the serpentine belt and used steel wool to rough up the water pump pulley and all other pulleys where the belt runs on the back side. Apparently after a lot of...