2002 Jackaroo V6 3.5L Engine Ticker

I assume there was no need to replace the lifters ? (unless they get real bad I assume).

Would using a better quality synthetic oil help quiet them down ?

The falcons I came across were either mates cars or family members cars, so I couldnt give an answer as to the effects of the oil, but I assume it didnt help as they all were taken to mechanics in the end to have the tappets adjusted. As I understand, the main cost was in the labour.
If youve got a car manual and a free day or 2 on the long weekend, I guess it couldnt hurt you to check all the specs.

Correct.
They are bucket type set up and very rarely get out of adjustment.
I would run an engine flush through the engine. Something like Nulon and then refill the sump with a 15w40 or even a 10w30 grade oil. I think the Jacks and the Rodeos state to run a 20w50 oil. The lighter oils move around alot quicker and give better fuel economy.
It is hard to get your head around a thinner oil but it is great stuff.
Does your car have a good service record.
I have had one that wasn't serviced and blocked up the oil pick up starving the engine for oil. Not a pretty sight.
Best of luck
80s

A also use a Fully synthetic 5/50 oil on my 3.5 Jack. Great oil & mine has done 110K & has no noise at all.

Willy