My dealer almost always overfills my oil. I believe there are two drain plugs that need to be removed. I don't think they are doing that. Regardless, I have switched dealers.I had my oil changed a few months ago and they put in to much oil. I went back and they changed the air filter. Now I'm having lots of problems - anyone have something similar happen?
You are correct, in the dry sump system there are two oil drain plugs that must be removed to properly remove all old oil. The non-Z51 wet sump has only one plug.My dealer almost always overfills my oil. I believe there are two drain plugs that need to be removed. I don't think they are doing that. Regardless, I have switched dealers.
Start using the new oil recommendations from Chevy on the C7 & C8. The new blend from Mobil 1 is the ESP 0-40 (do not confuse it with the 0-40 European blend - it not the same.)We bought our 2014 Z-51 in 2017 with 12,000 miles from a well known Chevy dealer in Iowa. I did not check the oil or drive the Corvette very far before trailering it home. Buying the car used, I had no idea what type or brand of oil was in the engine. Like most of you, I have a favorite brand of synthetic oil I have used in all my cars for the past 20 years. When I got home, I went on YouTube to see the process for changing the 2014 Corvette dry sump system oil. When I learned the procedure and performed the oil change, I dropped around 15 quarts. The capacity is 9 1/2 quarts of 5W30 with a filter. There was almost a full quart of oil in the air intake ducts- what a mess. I called the dealership and told them what I had found, and suggested they have a training session with their car porters when it comes to Z-51 Corvettes. It seems the porters are instructed to check the oil before starting and moving any vehicle. Not a bad thing for standard oil systems. The procedure is to check the oil level is to run the Corvette to circulate the oil, turn off the engine and check the oil after 300 seconds or exactly 5 minutes has lapsed- exactly 5 minutes! The dealership porters were checking the oil without running or timing the shut down period- they were never instructed. Every time they moved it, they added a quart. Thank goodness I didn't decide to take our Corvette on a road test- we had about 300 miles ahead of us and had to get loaded up and on our way. I think I avoided a major problem.