I'm starting to get white smoke out tail pipe???
 

She's starting to smoke ,white . Just changed the oil a couple weeks ago - castrol 10-30, took a road trip & when I got back I noticed her smoking lightly. She has 203 G's on her. Any ideas?

Head gasket

Headgasket most likely, do a compression test and you will find out.

What numbers am I looking for for good compression?

I should add that in rare cases a cracked head will do the same thing. Usually the gasket goes before the head cracks.

Also check to see if your oil has coolant in it. It will look milky/hazy. Another sign its a head gasket

what year and engine?

all the numbers should be within 25% of each other when doing a compression test. when 1 is in the 80s and the rest in the 120s-130s u should know which one it is

I think off hand it's 120 to 150 with no cylinders more than 30 off So if it's 120 then 90 would be problem cylinder

I also changed the water pump & t-stat recently & the pump leaked once & started to chirp so I bought another to replace it but havent had the time , am going to get to it this weekend. I had also noticed during the summer she would smoke when the AC was on.

I think it's there XJx3 92 4.0. So it's white steam that dissipates, and not bluish smoke that sticks around a bit? (water vs. oil).

92 4.0

White smoke, I'll check the oil tomorrow & tell you guys what I find.

I've got some what the same problem but my oil looks fine... it does leak out of the front main and rear main.... its got almost 200 k on it

^^so ur leakin and burnin? not good