Well, in
less than 24 hours since I picked up the car from the service,
1. ANOTHER Check-Engine Light (MIL) and same P0420 code... 
2. Front/right Turn-signal not working; burnt-out bulb?
Stopped by at Lotus Beverly Hills again this morning to address the issues. They are talking to Lotus about the MIL issue, and the turn-signal bulb was replaced.
All the services since new
[Warranty Service Items]
- ECU (replaced) - LBH
- catalyst/downpipe (replaced 2x) - LBH
- camshafts (replaced) - LBH
- O2 Sensors (replaced) - LBH
- exhaust (Stage-II crack, replaced) - SMC
- passenger-side rear turn-signal (replaced) - SMC
- front/right turn-signal housing (replaced) - LBH
- A/C relay (replaced) - LBH
[Warranty Accessory/Part Items]
- passenger-side clear-bra damaged (since new, repaired) - SMC
- soft-top (not supplied by dealer; delivered damaged; repaired) -SMC
- soft-top bars (not supplied by dealer; got only one. waiting for one more) - SMC
- hard-top velcro covers (not supplied by dealer; delivered) - SMC
- passenger-side rear wheel (damaged by dealer; replaced) - NE
- headlight recall (addressed) - SMC
- sticking door-lock recall (addressed) - SMC
- car delivered new with improper allignment (addressed) - SMC
[Undocumented-Warranty Items]
- front/right turn-signal bulb (replaced) - LBH
- loose handbrake lever (repaired) - LBH
- passenger-side window making wind-noise (repaired) - LBH
[Non-Warranty Items]
- oil changes w/ Mobil Delvac Synthetic 5W40 (@ around 1,000mi, 7,000mi, 12,000mi) - SMC
- oil changes w/ Havoline Synthetic 5W40 (@ around 17,000mi) - LBH
- rear tires Yokohama ADVAN A048 (replaced @ around 12,000mi, nail in tire and wear) - NE
- rear tires Yokohama ADVAN A048 (replaced @ around 17,000mi, nails in both tires) - LBH
(*LBH - Lotus Beverly Hills, *SMC - Symbolic Motor Cars, *NE - Newport European)