I have only seen blue smoke upon cold start up recently out of just the passenger tail pipe. Other than that, from a dead stop if I mash the acceleration, can see small puff of white smoke from the exhaust. Not sure what those indicators mean.

Car was driven hard but OCI always every 5k since 30k miles.

 

Its a 2015 w how many miles?
What about short trips of 10 to 15min and/or miles or less? Those are severe maintenance and required shorter OCI than occasional short trips with mostly highway miles.

 

I have the same questions. Following.

 

Car sits at 180k and bought with 30k. Mainly driven on long trips 30min+.

Thought about switching to 5w-30 which may help the consumption if it gets worse.

 

Well with that many miles a small blue puff would be normal with a tiny bit of oil getting through the valve seals while not running. White smoke is usually condensation if you only get it after startup on cold mornings. If you get white smoke every single time you floor it that would make me concerned for a coolant leak.

 

For those asking about the Ring Free, I bought the 32 ounce bottle (standard is only 12 ounces). The bottle says 1 ounce per 10 gallons operational use, but there's also a "shock treatment" it says to consult your local dealer for. Online you'll find that treatment is 2 ounces per gallon. I was hesitant to add that much at once. So for a 3/4 tank I added 12 ounces, which is about 1 ounce per gallon. I ran that down and then added the remaining 20 ounces to a full tank. The car runs well, and gets around 22mpg mixed driving at 173,000 miles, but didn't see any difference oil consumption wise.

 

I am thinking now that If It won't make a difference either.

I assumed when I did the Liqui Moly Oil Flush it should do a better job to remove the gunk stuck on the rings compared to Ring Free. Weird thing is before doing the oil flush, I NEVER smelt burning oil but still consumed while driving ( I have catless headers + exhaust ). After doing the flush, I now smell burning oil at lights or at a stop but consumption is reduced from before. I will pull the plugs one these weekends and see what cylinder(s) are coated in oil.

 

I tried Liqui Moly not too long go as well with no result. I think the only 2 options now are just continue topping off as needed, or potentially try a piston soak.

 

How much oil are you burning between OCI's? Do you burn more in higher RPMs?

I recently did a road trip 330 miles each way (all highway) and car surprisingly burned no oil. Also, smelled less oil at lights/ idle. Hoping the Pennzoil Ultra Platinum is doing its job after being on the 3rd OCI.

 

660 miles of continuous operation and no oil loss is good. I can say that when ragged on hard, my 350 has lost oil.

Mine has a tune, and usually the tail pipe tips are black with soot, but lets say it goes 3 weeks without being opened up, then when opened up, all the burned sediment stuck in the cats/exhaust comes out and makes a white cloud which makes since for those of us with CATs.

Do any of the engines using oil look nasty inside with the oil fill cap off? The products are for those that stuck the oil control ring which is usually a result of neglected maintenance.

I grabbed mine at 50K when it someone dropped it off for trade in as the lease expired. It had two prior owners, one for 35k, the other for 15k. Who knows how they were treated....

 

Update for you guys-

Changed the spark plugs this weekend and bought a borescope to check the cylinder walls and unfortunately found scoring in almost all cylinders where piston was down. So no product will eliminate the oil consumption perhaps only mitigate it. Although, it is still only in the "early" stages of oil consumption and since using Pennzoil Ultra Platinum has reduced my oil consumption, keeping it at 1qt or less every 5k. I didn't do a compression test or leak down test but likely compression must be low across the board.

Though I am not an expert, trying to see how long I have on this engine before oil consumption gets worse. Not sure how bad this "scoring" is if I am only burning 1qt every 5k and more during high RPM but if I can keep it at this level of consumption I will be happy until I find a used engine to swap it with.

Here is the video I posted of Cylinder 2 which is the worst.

 

Sorry man. Nope, no product is going to heal that. Could you tell if that was 360° or was it mostly isolated to walls 90° from wrist pin (piston rocking).

edit - intake and exhaust side vs front/back walls of cylinders.

 

It was mainly 360 scoring. But won't be able to pin point that until car is torn apart since some cylinders were up when inspecting cylinder walls.

I am surprised that there is scoring since I have did 5k oil changes but likely oil control rings are "partially" stuck causing some grooves in the bore where it will burn 100% of the time. Some cylinders you could see the leftover carbon/oil residue meaning rings are worn or stuck. I can live with 1qt every 5k

Though my car had used OEM Lexus oil 90% of the life, I will definitely opt to use better oil with cleaning additives on the used engine I will buy.

Right now car has no CELs, drives perfectly fine even at full throttle. Will keep driving it until it can't.

@2013FSport going to give Ring free a try shortly towards the end of the OCI and let you know if I notice any changes.