Re:Engine Oil
2012/08/23 08:15:20
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I use the Castrol Edge 25-50W in my good engines, and KMarts KMX brand oil in all others. BOTH hold very good oil pressure when hot and do not damage the engine.... I used a Shell Helix (yellow) once a number of years ago and that engine had negligible pressure when idling at the end of a sprint, whereas even the KMX still keeps virtually the same pressure very hot (in the worked autocross car) as it does at normal temps. I did use a Mobile 1 full synthetic for a few years, but it is too thin for a Pinto and runs away from the cam spray bar when cold. Didn't seem to do any damage, but I did notice that it took a little while on startup to build the pressure and it was a little lower than the heavier oils.
Everyone has their own personal preference for oil (some cheap and some expensive), but it should be for the original specifications for the engine and not a re-refined oil (they break down too easily) and something that does not damage you engine. (I won a bottle of Helix in a raffle a few years ago and gave it away, as I would not even use it on a road engine after what it did) If you have spent money on your engine and give it more than normal road duties, then you need to have a close look at what it is doing to your oil pressure/engine internals.....
Just my 2.2c worth including GST....