changing the oil in your '68 G.T.350 and your '67 G.T.500 which brand and grade of oil would you use. Thanks in advance for the help. You guys are the best and MERRY CHRISTMAS!!!
I change mine every October , 100 miles, or 900 miles. I saw or read a report on diff. oils, & Wallmarts Super Tech is equal to, or a little better than some of the major brands. The filter I use is either Motorcraft or Fl-A or something like that, [ can't remember ]. I use the car mainly in the summer months, so 10-40 is what I prefer.---S.
I use Castrol 20w50. I have been told by several mechanics that the heavier oil is better for the older motors. I change it twice a year which is about 500 to 700 miles between oil changes.
In using a heavier oil when you first start it up, does the oil flow to all the areas as fast as it should if you were using a lighter grade like 5-30 or 10-30 etc. When I start mine, I turn the starter 3-4 times before starting the car only to prevent ' dry start wear conditions ' so to speak.---S.
