Should I push HPL longer than 4K OCIs with track use?

[TiGeo]

3.5K miles so far this year on this oil and 3x hard track days. Oil was in the 270F + range for ~5 hours during that event last weekend. No more track until fall it's looking like so may pull sample once I hit 5K miles. I've added ~1/2 a qt so far.

 

[Four Rings]

I'm going to go for it. I'll just pull a few samples this year to have a look-see. Will be a good data point for the site.

Good. As you said, let UOA data be your guide. Share here if you’re so inclined, pretty please.

 

[TiGeo]

Good. As you said, let UOA data be your guide. Share here if you’re so inclined, pretty please.

You know I will.

 

[Revving2Redline]

Our esteemed moderator, @wwillson, has suggested longer OCIs for my Sportwagen on the HPL Euro 5W40. Thinking on it, ~4K OCIs are only being driven my track time, not miles. For example, my last OCI was ~4.1K including 5 track days...the UOA is forthcoming but I can't see why it will look any different than my other HPL UOAs....100 deg C viscosity at ~12cST and normal analyte/wear metal values, likely a bit of fuel but nothing egregious from what I have seen. Should have those results back in a few weeks. If they look fine, I think I may push this next one out a bit longer. Forecasting my 2024 HPDE schedule, I'm looking at ~11 total track days/~6 events over the course of the year. Oil temps on my car push upwards of 280 during these events. 11 track days equates to roughly 15 hours on track. My daily driving at this point is about 10K/year but can fluctuate. My consumable costs are not insignificant; based on my track events to-date, I am at $288/day in consumables (primarily tires/brake pads) but oil can be factored in too; this number is over-estimated b/c I've done quite a bit of experimenting with brake pads etc. so I expect that number to fall steadily over this year's events as I've landed on tires/brake pads that I like/last a reasonable time. This cost doesn't include fuel but I can't change that cost. Brake fluid is free from FCP Euro. So anything I can to do to intelligently reduce consumable costs is a good thing. One HPL oil change is $100 for me, filter is free from FCP Euro. So drop $200 off my 2024 costs at ~3 changes currently.

Can HPL Euro 5W40 be used for 15 hours of track conditions/high oil temps? So 1 year/~10K OCI?

Edit. I can just pull oil samples during the year...duh.

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It's definitely gonna perform better than Liquimoly. I think the Euro or No VII oil is gonna give you good results.

 

[TiGeo]

Ok mid-year/OCI sample collected. Not quite 4K mi...probably a 7-8K year total this year as I split daily duties with my W8 Passat wagon. 3x track days on this...sustained 270-280 oil temps for ~3 hours. Have 5 more track days in H2. Will see how this looks. Did add ~1/2 qt fresh so far...I don't typically see much if any consumption.