CaptRog21

Just wanted to get some thoughts on putting in an oil catch can. Coming from an '07 is250 that would have really benefited from it, I am wondering what the pros and cons would be when added to my '15 gs350. Anyone out there put one in?

bclexus

An oil catch can is really unnecessary and not worth it...

But, I'm curious to know why you thought there would have been a benefit of having an oil catch can for your '07 IS250?

praetor

WTH is an oil catch can? It catches oil I presume. LOL

bclexus

praetor

Ah OK thanks.

bclexus

An oil catch can is really not needed with a street driven car. It would only be of benefit with a super high-performance, dedicated racing engine that is used solely for racing.

er34

The IS250 engine is direct injection only and prone to carbon buildup. Oil catch can may not completely mitigate the problem, but should at least delay carbon buildup problems by reducing oil blow by. It's not necessary for the GS because we have dual injection which keeps the valves cleaner.

bclexus

I appears the carbon buildup problem with IS250 engine is more fuel related than crankcase ventilation feedback related. I see that Lexus recommended using premium fuel, which has a better detergent (cleansing) package. I doubt an oil catch can would help any.

Knucklebus

Oil catch cans aren't going to do much unless you have a lot of blowby, like a turbo or super charged engine. On a GS, I'd bet the monthly "Italian tuneup" would suffice.

bclexus

Yep, a few WOT runs every so often never hurts...

er34

Detergents won't do anything because the fuel never touches the backside of the intake valve. That's the inherent problem of all DI engines...

Our cars are port and direct injection. The port injection sprays fuel on the backside and cleans the valves. That's why we don't have this issue.

er34

Well, there is evidence that the catch can does a pretty good job on the IS250. Imagine that getting caked on the back of your valves. Can't be good.

https://www.clublexus.com/forums/is-2nd-gen-2006-2013/682989-the-oil-catch-can-experiment.html

I agree GS does not need it for the reason I have stated.

bclexus

I hear what you're saying...and it makes sense. I just did a quick search and saw this article (link below) that said;

Carbon Build-up – How to Prevent It
The most important thing to do is always to use name-brand premium fuel. This ensures that your engine is receiving the most detergent possible. Fans and owners also say that driving the car hard (redlining the engine occasionally) also helps.

► https://www.torquenews.com/1083/lexu...-you-need-know

Knucklebus

If you have that much blow by that's probably a bigger problem. I'd make sure I was using a good quality synthetic oil and monitor usage. My old cars easily go 3,000 - 4,000 miles without using any appreciable oil loss.

bclexus

I find it pretty incredible that Toyota/Lexus didn't realize with all the extensive testing they do that the IS250 engine would have a carbon buildup problem.