Oops! - yes - it was Penrite... - and checking dockets, discovered I actually went with Enviro+GF5 right from the first (6mth) oil change onward (redface). I've used Pennzoil in aeroplanes in the past so that's where that crept in from.
I was sure I'd gone with 5W-30 mineral for that first change but yeah, the old memory bank has ground into gear and it comes back to me now - I was determined to stick with Penrite which I've always used in my cars - but their 5W-30 mineral didn't meet the chrysler spec - so after doing some checking that the run in situation should be all good I went to synthetic straight away.
When I more recently tripped over favorable comments about Nulon synthetic 5W-30 I decided to try that.