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From experience, you'll prob want to shoot before 100K. I was at 76 K, and in no way was it extreme, but when you're dealing with an engine that's as sensitive and precise as a direct injection engine, so should your maintenance be with that same mindset.
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Thanks for that perspective, much appreciated, I only threw 100k out as a rough target.
I am quite certain that I will have the manifold off again long before then (spark plug checks if nothing else) and will keep an eye on the valves in the process.
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you cali boys gotta deal with much more , so I understand that.
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Yes we do.

Takes a whole lot of the fun out of cars as a hobby.
I see people who do muffler deletes for example.
Bad,
bad,
bad idea in Cali with the really strict noise laws on the books these days.
They have issued violations for people "driving in track mode",
no joke.
Nowadays it is no longer a fix it ticket either, it is a summons.
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as far as the "making the engine suck more oil out of the crank case... that's a crap myth made up by someone.
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Well, actually Elite claims that they do exactly that- more "stuff", mainly oil mist due to blow-by, pulled out of the crankcase.
Take a look at the advertisement they posted in this thread for example.
So OK, we go from having a squeaky clean manifold now to- who knows what????
Not worth the risk and cost versus just doing more frequent oil changes IMHO, but I do understand your point. Advertising hype?

However I do know from having dealt with air leaks on the manifold and throttle body already that the LGX engine is
very sensitive to un-metered airflow.
It is pathetically easy for it to throw codes in fact.
A sun roof water test? Seriously?
What do they do if it fails, make you tape up the seams?? Fiberglass it shut? Scrap the car?
OMG...... That is a bit over the top in my opinion (pun intended).
But then again here they WILL fail your smog test because you run afoul of some insignificant, possibly imagined, bureaucratic thing even though it passes the tail pipe test quite easily.
Don't ask me how I know that.