by Stritchy on Mon Jan 18, 2010 11:46 am
Fully synthetic wont cause any problems on a modern engine - will may make a high mileage engine rattle like crazy however.
It's the friction modifiers in Magnatec that can cause problems. 10W/40Magnatec is semi synthetic.
Your Blackbird can happily run on fully synth, but the substantial extra expense (every 4000 miles) will not give you any advantage.
Stritchy
HOC Webmaster - it's not all my fault... just mostly