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I have a spark 6k miles I use mobile1 5w30 syn oil and I use a kn air filter. But I'm only averaging 27mpg city driving is that normal or should I switch to a 5w20 oil???
I haven't looked into this as yet but if I find out what other brand's synthetic oil meet dexos and is available in 5w20, i'll make sure to let you know.To be honest my oil cap says dexos5w20 but I'm yet to see any oil maker stamp a 5w20dexos approved sticker on there bottle right now the only reason I'm useing m15w30 is because its desks approved I change my oil every 2k miles I'm about do for my third change and I was wondering if any other brand synthetic meets dexos and is available in 5w20. Thanks for your response and thanks for the warm welcome
Mobil 1 is usually good for this kind of stuff, I guess the market for that specific blend of oil isn't big enough for them to get into it yet. I wonder why GM had to go with that for the Spark, why not keep things simple?I love m1 but I'm not sure about there 5w20 I called mobil and they said they don't know when they plan on adding the additives in there 5w20 they told me to use 5w30 for the time being because I could void my warranty if I don't use anything that isn't dexos approved
I'm starting to think they added that oil this year to help with fuel economy or something as important as that, Otherwise I bet some "regular" oil can be used.This is the first year a gm car was ever factory filled with 5w20 this dexos stuff started in 2011 and it was Allways 5w30 not this 5w20 crap
The service schedule indicates to change the oil every 7500 miles if necessary. May I ask why you are changing it on 2000 mile intervals?To be honest my oil cap says dexos5w20 but I'm yet to see any oil maker stamp a 5w20dexos approved sticker on there bottle right now the only reason I'm useing m15w30 is because its desks approved I change my oil every 2k miles I'm about do for my third change and I was wondering if any other brand synthetic meets dexos and is available in 5w20. Thanks for your response and thanks for the warm welcome
I'm going to give this oil a try in both the Spark and the Corvette. With Mobil 1 in the Vette you could hear the lifters rattle in extremely cold temperatures, which went away after switching to Pennzoil or Peak Full Synthetic. Although I think Mobil 1 is a good oil, it has always resulted in engine noise during cold starts that other oils did not produce. I think I am also going to try Castrol Edge with Titanium too.