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Here you go guys. Avoid the return trip to the dealer like me because they put he wrong oil in. The cap is the same as a C6 Z06 and its 20$ and says Mobil 1 on it like ours should. Now I shouldn't have issues bringing it to the dealer for its free oil changes. C'mon GM we shouldn't have to pay for these. Pony up and put out a bulletin to replace all caps to avoid confusion.
Here you go guys. Avoid the return trip to the dealer like me because they put he wrong oil in. The cap is the same as a C6 Z06 and its 20$ and says Mobil 1 on it like ours should. Now I shouldn't have issues bringing it to the dealer for its free oil changes. C'mon GM we shouldn't have to pay for these. Pony up and put out a bulletin to replace all caps to avoid confusion.
Here is a picture of my 2015 Z06/7 Oil Cap as it came from the factory.
My question is; Dexos; note the cap and the 5W-30 bottle say DEXOS on them, the owners manual says you can use 15W-50 at the track. My dealer put in the 15W-50 at the first oil change AT MY REQUEST, but as you see the bottle does not say Dexos. So how important is Dexos? Is it an anti foaming additive?
In Arizona I don't need a 5 Weight oil so 15-50 is my choice here.
Here is a picture of my 2015 Z06/7 Oil Cap as it came from the factory.
My question is; Dexos; note the cap and the 5W-30 bottle say DEXOS on them, the owners manual says you can use 15W-50 at the track. My dealer put in the 15W-50 at the first oil change AT MY REQUEST, but as you see the bottle does not say Dexos. So how important is Dexos? Is it an anti foaming additive?
In Arizona I don't need a 5 Weight oil so 15-50 is my choice here.
Opinions aside, for non-track use, the C7 requires a dexos1 approved 5w-30 oil. Mobil1 15w-50 is required for track use (short-term), and is NOT dexos approved. While the response from the dealer may sound dramatic, he's technically right, and therefore justified in GM not paying for it vs. the warranty-compliant Mobil1 5w-30. Just the facts.
Fuel economy may be one reason, but the additive package is not designed the same as dexos (GM) requirements. I have read on more than one reputable source that the enhanced anti-wear additives helpful for racing used in Mobil1 15w-50 (ZDDP) are not intended for long-term use with modern catalytic converters. I'm sure there may be other reasons the 15w-50 additive package may not do well for extended use (based on the OLM).
You are correct. Mobil 1 15W50 has a high level of ZDDP. and this is why I used it in my Euro M635 (no cats). It is a great oil for certain applications but is not considered a good choice for a street car with a modern engine and catalytic converters. Its use in a C7 should be for track use only and then replaced with a dexos oil for everyday driving.
After review of the list of dexos certified oils, it is clear that there are numerous options out there that meet the GM requirements for the C7. The use of Mobil 1 probably has a lot more to do with an agreement between GM and Exxon/Mobil. Personally, I am not going to get my panties in a wad or get into a big discussion with my dealer as long as they use a dexos approved oil and it is installed correctly and in the correct quantity. Don't get me wrong Mobil 1 is a fine oil but there are a lot of quality oils. Also, most Corvette owners change their oil on a more frequent basis and thus the use of a full synthetic that has a useful life of up to 15K miles is more than sufficient. According to GM a synthetic blend is a perfectly acceptable alternative as long as it is dexos certified.
Mobil 1 5W-30 is Dexos and a synthetic (some will argue if it is a true synthetic), but there are also conventional 5W-30 that are dexos (an oil standard, not an additive).
The 15W-50 is not Dexos certified and is recommended for track use.
Not all of us live in the Valley. There is a good amount of high country freezing conditions where the 15W-50 could not be run all year round.
Here you go guys. Avoid the return trip to the dealer like me because they put he wrong oil in. The cap is the same as a C6 Z06 and its 20$ and says Mobil 1 on it like ours should. Now I shouldn't have issues bringing it to the dealer for its free oil changes. C'mon GM we shouldn't have to pay for these. Pony up and put out a bulletin to replace all caps to avoid confusion.
I'm looking to do the same thing. When I went on Amazon and looked up a C6 ZO6 oil filler cap cap it showed that this will not fit my 15 ZO6. Just want to be sure before I order it. Any feedback would be appreciated. Thanks
I'm looking to do the same thing. When I went on Amazon and looked up a C6 ZO6 oil filler cap cap it showed that this will not fit my 15 ZO6. Just want to be sure before I order it. Any feedback would be appreciated. Thanks
I ordered one from Amazon Part is ACDelco FC221. It is perfect.
Gilk
Great! Thanks again to my Forum Friends for always being there with a quick response. I'm calling my dealer now and requesting that he order it for me to avoid any more issues in the future. Will post again later with the outcome. Maybe we can all get them to do this.
There is a bulletin, and the dealership I work for tried telling me I would have to pay for the difference in Mobil1. I showed our service department the bulletin, and then the lube tech proceeded to fill my coolant reservoir full of Mobil1. Needless to say, I hammered them on the survey. It's all over the oil cap saying "Dexos".
You guys are terrific with the links to the tech information. I can always learn. In my old racing days, 50 weight was required with a lot less HP than now. Then synthetics came out and changed the viscosity issue but caused other problems. The chemistry is way beyond us mear engineers these days. I'm not going to worry about the catalytic converters and the Zinc level in 15-50 M1.
05-27-2015, 09:56 PM
Oil change "fix" dexos vs. Mobil 1
