Hello,

Took a decent drive, yesterday, maybe 150km round trip, possibly more, speed varied from 60kmph to 120kmph, at one point to pass three vehicles doing 10kmph less than the speed limit of 100kmph.

During the burst of speed, then letting my foot off the accelerator pedal after passing the leader of the three, to coast down to the speed limit, when I put my foot back on the accelerator, I noticed a cloud of bluish gray (grey) smoke. My car doesn't burn oil or very, very little. I do notice the Zenith-Stromberg 175CD Dashpot Oil was lower, when I returned home, however.

Inlet Valve Stem Seals or what's your best guess?

Also, what is your mileage?

My Mileage has steadily improved, mostly around town, seldom if ever freeway and if so, not very far, always just my wife and me:
•19:41 02 January 2005, 148,186km, 36.00L, $$38.12, 8.6917km/L, 20.4441mpg
•18:07 30 December 2004, 147,873km, 37.00L, $41.03, 6.773km/L, 15.9310mpg
•21:52 23 December 2004, 147,623km, 38.14L, $40.01, 6.607km/L, 15.5412mpg
•21:00 16 December 2004, 147,371km, 32.73L, $34.01, 6.575km/L, 15.4654mpg
•20:44 10 December 2004, 147,155Km, lots of idling, high speed runs up M1 to 130km/h, tune-up idling, leaking Brake Booster repaired at half tank, mixture was CO 4.49% to 5.64% and adjusted down to CO 1.79%, 27 deg C days, 297.5km trip, 45.00L, $49.55, filled up with Mobil Synergy 8000 Premium 98RON Octane 6.6111111km/L, 15.550297mpg
•19:46 03 December 2004, 146,858Km After Carburetor CO Set to 2.24%, Valve Clearance Adjusted 162.3 Trip, 27.0Liters, BP Ultimate 98 Octane added 6.0111km/L
•16:19 26 November 2004, 146,696Km, 262.3 Trip, 40.03L, $47.00, 6.5525km/L
•14.25 19 October 2004, 145,618km, 44.01L, $47.87, 7.357418km/L, 17.350572mpg
•11:19 08 October 2004, 145,294km, 42.00L, $45.61, 7.564286km/L, 17.792303mpg
•15:43 25 September 2004, 144,645km 33.00L, $36.93, 7.0030km/L, 16.472148mpg
•14:28 21 September 2004, 144,414km After Tune-up and Carby Mixture Adjustment, 317.6Km 48.07Liters, used Regular Unleaded Petrol, added Octane Booster, 6.6070314 Km/L or 15.540701SM/G, $49.46, refilled with Premium
•17:03 10 September 2004, 144,096Km Before Tune-up and Carby Mixture Adjustment, 239.75Km 40.00Liters, used Premium Unleaded Petrol, 5.99375Km/L or 14.098174SM/G, $42.76, refilled with Unleaded
•20:48 02 September 2004, 143,856.5Km, First fill-up since buying car, 46.53Liters Premium Unleaded, $47.88

This has been better than my B21E ever was, though I spent more money on maintenance.