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Re: Final Sludge Cleanup, HDEO - Diesel ?? [Re: jssaab] #5328194 01/20/20 07:38 PM
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Mad_Hatter Offline
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I think you're fine really. Obviously if you drove more the MMO would clean more but it is what it is, right? As for you using a 0w30 with the MMO, my guess is your car can run on an Xw20, so even if the MMO thinned the oil down a grade you should be fine.. not to be forgotten, you haven't had a CEL or low oil pressure light right? If you were "too thin" the ECU would throw a code. As for your highway miles, millions of cars zip along at hwy speeds on a 20 grade just fine. Like I said, if this were me I'd be fine with what your doing/how things are working. And I don't see any problem running some Rislone with your diesel oil as it will attack any residual sludge and varnish from a different angle using esters.. maybe run one oci with just plain ol' oil then follow that up with an oci with the Rislone?? From there on regular oil changes with that Valvoline HDEO at a reasonable interval, should keep cleaning things up...👍

Last edited by Mad_Hatter; 01/20/20 07:39 PM.
Re: Final Sludge Cleanup, HDEO - Diesel ?? [Re: jssaab] #5328358 01/20/20 10:37 PM
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groomerz Offline
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How hard is it to drop the oil pan and inspect the pick up screen and oil pan. I had a oil pressure light come on a Lexus by known sludge I replaced sender that looked like it was new already so I dropped pan and screen was partially blocked


2002 Lexus Ls 430 98k
2009 Lexus RX350 90k
1998 Lexus ES300 141K
Re: Final Sludge Cleanup, HDEO - Diesel ?? [Re: groomerz] #5328452 01/21/20 05:49 AM
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Mad_Hatter Offline
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Originally Posted by groomerz
How hard is it to drop the oil pan and inspect the pick up screen and oil pan. I had a oil pressure light come on a Lexus by known sludge I replaced sender that looked like it was new already so I dropped pan and screen was partially blocked

For someone like me who's almost 50 and a back that needs surgery...not impossible but not a walk in the park either. And maybe someone doesn't want to break a known good pan seal.

Plenty of legit reasons to consider alternate approaches..

Re: Final Sludge Cleanup, HDEO - Diesel ?? [Re: jssaab] #5328474 01/21/20 06:29 AM
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BMWTurboDzl Offline
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Originally Posted by jssaab
The car as VVT and I have heard that higher viscosity and cold temps and mess with the timing due to the super fine screens in the VVT soleniods


The screens can get clogged up if the OCI is extended out too far on the inappropriate (for the interval) oil. Anecdotal experience: Once BMW moved to GTL(Shell) oil and a 10k mile OCI from a 15k mile OCI solenoid failures became a rare occurrence.


“It took untold generations to get you where you are. A little gratitude might be in order. If you’re going to insist on bending the world to your way, you better have your reasons.”

435i
Re: Final Sludge Cleanup, HDEO - Diesel ?? [Re: groomerz] #5328481 01/21/20 06:52 AM
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jssaab Offline OP
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Originally Posted by groomerz
How hard is it to drop the oil pan and inspect the pick up screen and oil pan. I had a oil pressure light come on a Lexus by known sludge I replaced sender that looked like it was new already so I dropped pan and screen was partially blocked


Not impossible, if you pull the engine...

I like the @mad_hatter approach so far, will do the HDEO change at 3-5 k miles (when its a warm spell, oil change- only that, then HDEO and Rislone,

Then, depending on my mood, when I have my other car back, to the trav method, when I can let it sit for a bit, maybe when its a bit warmer too.

Based on the comments abut Trav's process, it seems that will dissolve any crap in the screen. I will post updates as I go

Thanks once again for all the thoughtful replies


2013 Jaguar XF 3.0 AWD Supercharged, Tuned 460HP Castrol Edge 5w-30 90k
2006 Saab 9-3 Aero 160K tuned 360 HP Mobil1 European 5W-30
Re: Final Sludge Cleanup, HDEO - Diesel ?? [Re: jssaab] #5337095 01/31/20 07:48 AM
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D1dad Offline
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I’m seeing some positive results on my nissan oil burner after a kreen piston soak as well as 3 kreen runs in the oil. The last time I added a pint and drove it for 1k and then drained and refilled with maxlife 0-20 which isn’t the correct viscosity, although it’s called for in the same engine from 2013 on. I have a new, low mileage yard engine that I’m going through when I have time so I’m not really concerned about my experiment here if it does damage. I’m about 800 miles with the maxlife and the level has barely budged but then again this car has given me false hope way to many times. I went against conventional wisdom with the 0-20 simply because when I used heavier weights, the consumption increased.

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