Originally Posted By: PimTac
Originally Posted By: Danh
There’s lots of discussion on CRV forums about Honda’s 1.5T and fuel fuel dilution. Alarmingly increasing crankcase levels, CELs, stalls and even a few engine failures are reported. The Chinese government has ordered a sales stop of CRVs and Civics equipped with the 1.5T until Honda develops a credible solution for fuel dilution. And Dblshock here has his own story.
The 2.0T could be a completely different story, but if it shares the same engineering DNA it’s worth watching.
Danh, is the 2.0 based on the 1.5?
Not sure, but it seems to me the fuel dilution issue is more related to tuning philosophy than engine design. Honda is certainly capable of desiging superior engines but its DI/TGDI engines (2.4 DI and 1.5 TGDI, for example) seem to have fuel dilution tendencies that are worse than what’s found elsewhere in the industry.
Of course we don’t know why this is so, but one could speculate it’s to: 1) maximize fuel economy of the EPA cycle and/or 2) making absolutely sure that LSPI never, never, ever occurs and/or 3) insisting on 87 octane fuel when higher might be appropriate.
If Honda’s 2.0T is tuned with the same objectives and compromises as Honda’s other recent efforts, fuel dilution could be an issue. Guess we’ll have to wait for a few UOAs to see, but until then caution may be useful.