cariveau

I have 1,000 miles on my truck after having it re-ringed and it has not burned a drop! I have yet to take it on a good road trip to really see how it performs but will post when I get those results. I have been wondering lately if my oil consumption, ring seating issue, was actually caused by me changing to synthetic oil... Has any one talked about this? I bought the truck new and switched to synthetic at 10,000 miles. I really didn't notice the problem until the upper 20's but that was because I was having it changed at the dealership. The first oil change tha cost me $75 I started doing it myself. HT efirst two times I changed the oil it was low, then all of a sudden my oil light comes on a road trip which appears to be 1-1/2 quart low. Well just wondering if anyone else has seen this relationship with synthetic.

I just had my '07 sierra re-ringed last week at the dealership where I bought it. I have 64k on it now and started to see the problem around 30k (or earlier) when my check oil light came on during a long road trtip. What I found with mine is that it would burn a lot more oil during long interstate trips. In 400 miles I could easily use 1/2qt! Once we did an official consumption test the dealership added a deflector shield in the oil pan. They told me that this has fixed 80% of the vehicles they see. When they inspected the vehicle at this time they found one cylinder was completely fouled and not firing. In fact, they broke the spark plug off when trying to remove it. They let it sit over night with a solvent in the engine to remove build up. After this I was not going to back down from having it re-ringed. As anticipated the deflector didn't help at all. It took awhile for me to positively determine this as I needed to take a long trip. I am happy that they stepped up and did the right thing now all I need to do is what to see if it gets better... Ryan

I had my '07 Sierra in last fall to the dealership where I purchased it from because I found the low engine light was coming on after 2500 miles or so. They told me that GM had told them not to rebuild anymore because they had a better fix coming out... I figured I'd give them some time and didn't call back until last week. They scheduled an appt. to drop the pan and install a deflector. I guess we will see how this works. I didn't notice the oil usage at first because I had the dealership changing the oil but when i switched to doing it myself i found it to be low. In fact the first couple times I just thought that I didn't fill it up all the way... It doesn't leak at all and I have been using synthetic since about 10,000 miles. It has about 60,000 on it now. it seems to use more when I drive more highway miles. I friend of mine actually had his GXP GP rebuilt because of the same problem.