Now thats a title I have never been granted before. Geee. Thanks.
By the way, when you say, you use 20w-50, I couldnt grab the part. Was it a Diesel?? Was it a CG_125, or was it a gasoline with 250'000+ Kms on the ODO??
And it would be much more convenient for me (infact all of us) if you could share the mileage you managed to get out of YOUR City 5th gen?? No other car. Just the city 5th Gen. Because thats whats under discussion here.
Okay, let me return to normalcy. With sincere respect, dont treat my rhetorical questions as too offensive. The 5w30 may at one end suggest that one has to use it in below freezing temperature, it actually reflects alot in the performance of especially these new engines. I am speaking out of experience. Both in terms of mileage and engine responsiveness.
Yes, the old R18 VTEC can manage with 10w30. I have used 10w30 and reverted to 5w30 in this new L13Z and have observed certain difference in mileage. Even the L15 starts to reflect insane pickup with the CVT although the engine noise is a bit more with thiner lube.
Why would you promote cheapest oil with high quality filter. What good is a filter when the OIL breaks down chemically??
And when we point out catalytic converter as a culprit, it would be a good way to first use a vacuum gauge test for clogged converter before swapping the expensive item. Since we dont value its presence much in our region, its easy to mechanics to point it out as choked because they know no ones gooing to replace a 70~80k+ item. Rather break the honeycomb, enjoy the new roaring family sedan and off you go.
I certainly agree to your diagnosis of bad fuel. It can clog fuel filters. But it cannot clog a converter this early in its service life.
Hope that helps.