It is dangerous to compare your daily driver to the Delorean. For one thing (very important!) the Delorean has mechanical lifters not hydraulic. The relationship between the camshaft and the tappets is very important in the selection of a motor oil. Another critical factor is the clearances built into the motor and another is the type of piston. It is always best to go with the manufacturers recomendation but with today's improved oils as long as you purchase a premium branded oil close to what was recomended you will be fine. You will not find much of a performance increase in the selection of an oil, look for longevity. Change the oil once a year with the filter and you will be fine. More important than the selection of the oil is to NEVER overheat the engine!!!!!! David Teitelbaum vin 10757 --- In dmcnews@xxxxxxxxxxxxxxx, "thomaspaulmccoy" <thomaspaulmccoy@xxxx> wrote: > What are the disadvantages of using 5-30? > > GM specifies 5-30 in my new car (37K miles so far - no probs). If > one was looking to boost DMC performance, wouldn't 5-30 be a decent > solution? > > > > --- In dmcnews@xxxxxxxxxxxxxxx, "therealdmcvegas" <DMCVegas@xxxx> > wrote: > > I would only reccomend using 20w50 in temperatures that are > constanly above 90°F both day AND night! > > > > I second that statement... stay away from 20-50! A few high revs or > redlines in cold weather & you're going to see an increase in > driveway oil spots.