My 2004 Z71 just rolled 100K miles. I was thinking about going with a different oil, for high mileage. I'm completely "brain dead" right now, and cant remember what the dealership currently uses. I'm considering changing to royal purple, any concerns??? Should I do anything before changing brands (complete flush)??? Or, will it be ok to drain it, and put something else in???? Anyone suggest a different high mileage oil?

 

never been a fan of RP, seems to get really watery

Im switching to Schaeffers in my truck its got 120k on it, dont need to do a "flush"

 

I have no experience with the royal purple.

I have been running Valvoline Maxlife for high mileage engines in my truck since 80K.

It's over 160K now.


A flush wouldn't hurt, but I would change to whatever brand you like and just keep an eye on it at regular intervals to make sure it's not burning off.

 

Dump a half a quart of tranny fluid in the oil and drive it 100-200 miles and then change the oil, thats your engine flush done right there.

As for royal purple, it's a waste of cash in my eyes.

Just get some valvoline syn oil if you want a nice full syn oil that can do 5,000 on a change. Otherwise you could be like me and just keep running the cheapest oil out there and never have a problem as long as it's changed on time.

 

I run 10w-30 full synthetic royal purple, boosted 5.3 with 134k miles.

fwiw

 

I run Amsoil 10w40, all your over the counter oils have most of the Zinc removed from them....

 

Thanks for all the input, keep it coming.

 

Is zinc bad? I honestly have no idea.

 

Zinc is good but over time it can plug up cats if you have them I guess. Its also referred to as ZDDP. I want Zinc in my oil.

 

How many miles are you getting out of your synthetic oil with a turbo? Mine is whooping regular oil currently. Must be the heat cycles the turbo puts on it.