On my grand caravan I recently switched to full synthetic. Currently 147000 miles on it. I know my van consumes a bit of oil between changes so this is not what I expected.
Current fill is Pennzoil Platinum 5w30 with 1600 miles on it. This oil seemed to darken faster than conventional. Most notable color change happened a week ago. Coincidentally the level went up. Only thing I can think of was when I went for a long weekend drive. Did I just release a bunch of sludge?
I'm also considering headgasket problems but I haven't seen any signs of trouble yet.
No odd tailpipe smoke.
No unusual smell in the oil or coolant.
Vehicle runs good and no overheating.


Current fill is Pennzoil Platinum 5w30 with 1600 miles on it. This oil seemed to darken faster than conventional. Most notable color change happened a week ago. Coincidentally the level went up. Only thing I can think of was when I went for a long weekend drive. Did I just release a bunch of sludge?
I'm also considering headgasket problems but I haven't seen any signs of trouble yet.
No odd tailpipe smoke.
No unusual smell in the oil or coolant.
Vehicle runs good and no overheating.