mate what i have is feedback from numerous people in the industry including mechanics and drag racers as well as some of the customers that come into the store. most that i have talked to say that in their opinion penrite is one of the best out there up with mobil and the like in terms of quality and engine protection benefits. Also with the company being australian owned it makes the decision easy over the other oil giants such as castrol/bp or shell. :thumbsup:
but mate its personal opinion i believe that this oil is great ive been running penrite oils in my car for over 2 yrs now with absolutely no probs and i will continue to use them in the future.
as for spending $20 on oil u get wat u pay for, in this bracket your getting an oil that has a basic makeup and is fully mineral based. spending a bit more and getting an oil that has some sythenic compunds in it is goin to give u better protection on startup which is where most of the engine wear happens because sythetic oils are a lot stickier than mineral based oils.
but then again it depends wat ur running it in...puting $20 oil in a older car would be fine but then puttin it in a brand new car would not be adviseable.
but basically it all comes down to wat u wana spend and do u wana get the most out of ur engine, interms of performance and life.
hope that clears things up
ryan