17 Civic 1.5T, 115K mi, Pennz Euro L 5W30, 7K OCI

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Mar 4, 2003
Messages
256
Location
Wellington, Florida
Changed the oil a little early this time around, meant to go 9K but was under the car changing the CVT fluid so did both at the same time. Driving habits typically do not involve short trips which helps minimize (so the boards say) the fuel dilution issue with these engines.

Whether I use Euro L, PP or PUP, this little engine seems to "like" it. So next ODI will feature a mixture of these oils... but not deliberately. I thought I had Euro L in my inventory but after draining the oil, I discovered I was just about out of Euro L. I intend to use PUP 5W20 going forward in all my cars (except the Porsche) so decided to use up the Euro L and PP I have lingering in my cabinet, so here's the mix:
- 2.0 qts PUP 5W30
- 1.4 qts PP 5W30
- 0.3 qts Euro L 5W30
... and a 7K OCI, that is if I remember t change it in time.

As I type this, and look at the recent history, does it appear that 5W20 performed better than the 5W30?

The iron wear is what's drawing my attention. I inserted a row into the spreadseet to show iron wear as PPM per 1K miles and you can clearly see the difference. I'd like to hear what the more seasoned and knowledgeable members have to say about this, and I'll take all feedback and recommendations.

At this point, I'm going to change the oil early at 5K and start using 5W20 @7K OCIs. I'm going right back to PUP but will look into PP High Mileage as an option as well.

17 Civic Jun 2025.webp


17 Civic UOA History JUN 2025 fe indicators.webp
 
There is so little variation in your data that it isn't significant. We have no way to know how much lab error is in your data, so there is no way to account for it and there is lab error. No UOA data is 100% accurate.

The average Fe is 1.62 so 2.06 is only 0.44 ppm/1k miles above the average. There is no actionable data here.

Until you have a good trend, I wouldn't change anything.
 
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Notice the 30 grade Euro stayed in grade where as PP fell into the 20 grade territory. It didn't appear to impact wear, but the viscosity is better with the Euro L>
 
Changed the oil a little early this time around, meant to go 9K but was under the car changing the CVT fluid so did both at the same time. Driving habits typically do not involve short trips which helps minimize (so the boards say) the fuel dilution issue with these engines.

Whether I use Euro L, PP or PUP, this little engine seems to "like" it. So next ODI will feature a mixture of these oils... but not deliberately. I thought I had Euro L in my inventory but after draining the oil, I discovered I was just about out of Euro L. I intend to use PUP 5W20 going forward in all my cars (except the Porsche) so decided to use up the Euro L and PP I have lingering in my cabinet, so here's the mix:
- 2.0 qts PUP 5W30
- 1.4 qts PP 5W30
- 0.3 qts Euro L 5W30
... and a 7K OCI, that is if I remember t change it in time.

As I type this, and look at the recent history, does it appear that 5W20 performed better than the 5W30?

The iron wear is what's drawing my attention. I inserted a row into the spreadseet to show iron wear as PPM per 1K miles and you can clearly see the difference. I'd like to hear what the more seasoned and knowledgeable members have to say about this, and I'll take all feedback and recommendations.

At this point, I'm going to change the oil early at 5K and start using 5W20 @7K OCIs. I'm going right back to PUP but will look into PP High Mileage as an option as well.

View attachment 290447

View attachment 290449
UOA is analysis of oil not engine. Only time you can figure something is going with an engine is if you wear is 10ppm, next time 20, next time 30ppm etc.
What you have here could be product of more city driving, colder weather, oil leaching more metals bcs. certain additives or base stocks.
 
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