What kind of oil and oil filter does a 1971 porsche 914 gt use?

10w 30 or 5w 30 or what?What kind of oil and oil filter does a 1971 porsche 914 gt use?
The older air-cooled models do best with either synthetic or heavy duty cycle oils. Synthetic can often be problematic in older engines, as the synthetic oil molecules are smaller and prone to exposing seal gaps that would be too small for regular oil to seep through... for this reason, I would only look at synthetic if you are already successfully running it, or the engine has been recently rebuilt.





If synthetic, Royal Purple or Redline are likely the best choices. Mobile 1 remains a solid choice that's readily available, but recent changes in it's formula make it less than ideal for long duty cycles in an air cooled engine (and this is also the case with many of the synthetics on the market now, the two mentioned above being notable exceptions).





On the heavy duty cycle side, I would consider Swepco 306 to be among the best. Shell Rotella (15W40 or 20W50 being the heavy duty cycle offerings) was the OEM oil for Porsche for many of these engines, and it remains a good and economical option.





As for weights, you will generally run a little heavier in an air cooled car, though if you are in an especially cold climate you may need to use something much lighter... otherwise, look at the 15W40 and 20W50 as I mentioned above in conventional oils (10W30 for very light, and avoid 10W40 as this is too much of a range for a multi-viscosity that is that light).





As for the oil filter, the OEM is most likely Mahle (as this is the case for almost all air-cooled Porsches; check any Porsche parts specialist like Pelicanparts.com). This should offer good protection and will be less costly than other premium filters that you may find.What kind of oil and oil filter does a 1971 porsche 914 gt use?
10w-40 semi synthetic I reckon. For a firmer grasp on oils and properties, there's lots of useful information here;





http://www.opieoils.co.uk/technicalinfo.aspx
I would use 5w 30 sense it is getting colder and as for the filter If your going to do it your self check the spec book at the auto parts store