Sub optimal, but hardly a no-no. Many diesel oils carry SN ratings. Premium Blue Extreme is a 5w40 rating SN that just happens to have about every diesel approval in existence for that grade. Many Euro diesel oils are also pretty dang good "petrol" oils.
These days, additive packs are all about balance. We as oil buyers need to stop thinking in terms of ingredient and thinking in terms of recipe. It's not about how much zinc or how much moly, it's about the total add pack.
Yes, but it also is probably inside a vehicle with less life remaining than the engine. It’s ok to use cheaper oils when your timeframe is shorter. Just change frequently enough and it’ll be fine.
Only thing I noticed was it started burning between 3k and 4k miles. Car did not burn prior to VRP, resolved prior to VRP becoming available. It was visible blue smoke at idle that it never did even when i bought and it was burning 2qts an oil change. So i just ran is at 3k oci's and I was using VRP, 5w30, to clean varnish off the cam lobes. Other than that it's fine, I would just not do longer OCIs with it. I do 5k oci's normally and it's normal usage is ~8oz over an oil change. Have used 5w30, 10w30, 0w40 and 5w40 oils in it for those averages. Will be using VRP 5w30 in a new to me 07 Impala 3.5l, 187k miles, after the next oil change. Didn't have any on hand so the Impala got Castrol Edge Euro 5w40 w a bottle of Rislone to start the cleaning process.
No burning prior to VRP. After running VRP for over 3k miles it started burning oil. Others have noticed it too. Change at 3k and call it good.
