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Another update, and resulting in some success. After doing running renewable for over a week, it seemed to not improve dare I say get worse, found myself in a pinch in mountain single lane traffic uphill and could not escape the low load knock, even downshifting and keeping the rpms high. KC dropped down to single digits and car could not make it up the hill, cars behind me, had to find a pull off and reset the ecu to even make it drivable again, twice, infuriating. With only about 300 miles on renewable lubricants, and no signs of improvement, I drained it and did a full oil change again. Complete waste of fantastic oil. Trying a new oil, after looking into Rat 540's oil blog, wanted to try an underdog yet high testing oil just to see if it makes a difference. Quaker State Full Synthetic Dexos 1 Gen 3 5w-30 is next up. Drained oil, left it overnight in the garage to extract every bit of renewable as possible refilled with Quaker FS added 8.5 quarts and started up. First noticable difference once the rpms came down, the tick is only just heres and there's, much quieter. Added more oil to reach desired amount of just shy of 1/2 on the dipstick. First drive. Knock sensors pick up a little bit when the engine and components are not at full operating temp so I have needed to keep an eye on OBD fusion pulling out of the neighborhood and down the street until full warm up. I did have a couple instances where the KFV would to into the -5.0 area and accelerate to -9.0 and eventually pull down the KC value. Was able to quickly recover the KCLV after a hit, but seeing knock above -4.0 is not nearly as frequent. There is a possibility that if I had not been watching the KFV at all times it could have resulted in KCLV crash... However, this is manageable and very mild compared to the situation with amsoil and renewable, I have driven the car for about 250 miles and 7 engine cycles now on quaker and it is improving with each driving cycle. I'm very pleased with the low volatility of this oil seems to have. Given it does test surprisingly high, it was still incredibly cringy and felt so wrong to add such a cheap oil ($22 for 5 quarts at walmart) into an F, but I suppose its better than oil for an obnoxious price and the car seems to be taking it very well. I have maintained 24.5 KCLV for the past 3 driving cycles with very little issue
edit: now have about 350 miles on it and no need to watch OBD until next oil change. QS ftw!
Amsoil is now heavily marketing "100% LSPI protection". Did their formula change? Did they notice LSPI issues with their previous formula? Really interesting they are marketing it front and center.
I do not remember this feature ever being marketed from Amsoil before.
does anyone have any thoughts about this being an oil drain back issue?
could a screen filter be clogged somewhere?
could we have a issue with the scavenging pump?
oil bypass valve?
I also believe there may be a filter or some kind of check valve going into the back of the engine from the factory AOS system under the intake, could this be clogged up causing more oil ingestion through the intake?
04-16-24, 08:55 PM
