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Originally Posted by au3xr6
I use fully synthetic 5W30 I have found it to be the only thing to get rid of the famous AU lifter tick.
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Can't say I've heard this lifter tick in all my high mileage 4.0s (280k to 650,000km), are you mistaking it for the injectors?
I just put a 5w-30 into my 650k XR6 and she burns it good, it was free. I usually put 20w-50 in there every 5k.