The usual complaint - 3-4 flaring

[automatic]

Hi all,
I am the owner of a low mileage 1994 mayfair.
I originally changed oil (filter) for 15/40 semi synthetic.
I have since changed twice with 20/50 mineral - all in the space of probably 300 miles.
Symptons are:
From cold - first set of complete changes are really smooth 1-2-3-4 - after first complete stop 1-2-3 fine 3-4 flares slightly.
If I warm the car up on the drive for half hour before driving - first set of changes are still really smooth - then as above.
When hot 1-2-3 good 3-4 jerks @ higher rpm.
When hot - using full throttle all changes are consistent and firm @ similar rpm.

[69hcode]

Try running 10w40 in your box. I was running 20w50 and learned it's too thick for the newer boxes. I had some of the same symptoms as you and it runs pretty good now. Sometimes takes while to go into any forward gear though when warm. I'm going to do an oil change this weekend and se if it helps.