I'm sorry to harp on this, but it is a pet peeve of mine, when I see people posting that you have to do all these things that come at some expense and hassle that end up discouraging more people from participating on track days.Īs an HPDE instructor I am sick and tired of having students come in believing they need to do this gigantic list of things and spend hundreds and hundreds of dollars to come do 4 20 min beginner sessions on track. Everything in the press release is normal marketing, and says absolutely nothing about the other Dexos2 0/5W40 being less capable than the Mobil 1 Dexos2 oil. Mobil 1 0W40 is simply the oil, among the ones meeting the Dexos2 spec that won the GM corporate contract. It is plainly and completely clear that you don't need to change it back if you choose one of the other options (which include any Dexos2 0/5W40). And if you choose one particular one on their list (Mobil 1 15W50) then you need to change it back after the track even. It says clearly that you should change oils to one of the oils listed. The Supplement is very clear, and the information is also on the normal 2018 owners manual.
#XCESS VS XCLEAN STI FULL#
It's not outright telling you to drive full time on it The HP supplement that you quoted is telling you to change over to the Dexos2 for the track event. The ESP Mobil oil is pretty solid for an OEM recommendation but remember they are balancing many variables when designing the oil and not many of them deal with the ultimate engine protection. I personally would stay with the 5w running on the track and leave the 0w for the street cars but that's just me. For cooler track days something like Driven 5w30 would be great, once the temps got higher you could switch to their 5w40. Also, what are you looking to do with the car? To be honest there isn't a 1 size fits all answer since your temperatfures will fluctuate quite a bit over the year. Oils are very complicated and comparisons are difficult to make unless you narrow it down to specific brands and products. It has additives that will not degrade the emissions system so they can officially recommend it for full time use.Īs far as the viscosity you choose and what is better, that's a difficult question to answer. If you read the press release and literature regarding the new reccomendation for 0w40, it is specific to one mobil1 product. It's not outright telling you to drive full time on it because there are regulations in place regarding catalytic converter life and the dexos2 will not allow the emissions system to function well enough, long enough for the government.
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