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    Can I run a low SAPS oil now?

    Yes, now I see that there are several 504 oils, although availability is spotty. Any reason to choose 0W30 vs 5W30, and factors to differentiate between the different brands? - in terms of minimizing intake deposits. I called to check yesterday, and a shop near me quoted over $1k to do the valve...
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    Can I run a low SAPS oil now?

    Hello folks, I have a 2018 VW Golf R with direct injection. The first 30K miles I used Castrol 5W-40 and now I am using 0W-40. At some point, I might have to worry about intake valve deposits, so can I use a low(er) SAPS oil instead? I don't think they are "backwards compatible" with the VW...
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    Viscosity breakdown a problem or no?

    I have separate gauges for oil and coolant temperature. The coolant temp goes up to 194F within a few minutes and stays there. The oil temp takes at least 15 min of driving to get up to 210+. Normally hovers around 220 average temperature. Up past 230 on hard driving. I would still kind of like...
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    Viscosity breakdown a problem or no?

    Well, what can I say. The first oil analysis is factory fill oil. The next three are from the VW dealer, which claim Castrol Edge 5W-40 on the receipt. The next fill, I did it myself and got a jug of also Castrol Edge 5W-40 from Walmart. I did a Horizon / Oil Analyzers test on it after 5500...
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    Viscosity breakdown a problem or no?

    ok, I will get an amsoil analysis then. My oil temps at the end of my short commute range from 170 to 210. The normal operating temperature is around 220, so I know the oil is not reaching full temperature. Is there a cumulative, permanent degradation in viscosity from having fuel in the oil, or...
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    Viscosity breakdown a problem or no?

    How do I tell if I have a fuel dilution problem, or a shear viscosity breakdown problem?
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    Viscosity breakdown a problem or no?

    yes, it's tgdi engine. Even if Blackstone's fuel dilution number is off, the flashpoint is still kind of high, so probably no actual fuel? First column is original VW break-in oil. Everything afterwards is Castrol 5W-40 (what they fill at the dealer anyway). Only minor mods to the car like...
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    Viscosity breakdown a problem or no?

    Hello folks, I have been running Castrol Edge 5w-40 in my 2018 VW Golf R for a few years now. All the oil analyses show a lower viscosity than other reports I'm seeing. It's probably because I do a lot of short trips in this car, and somehow the fuel burns off by the time I do the analysis...
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