Dave

Check with the tyre fitter (ie local tyre shop) as they have a copy of the standards relating to fitting of tyres on specific rim sizes. Your looking for tyre and rim association standards manual. Dave

The pulse train is likely to be too fast for a multimeter to read (unless it has a freq setting). I suspect the duty cycle would remain constant across the speed range, thus the voltage AVERAGE (what most meters will indicate on DC mode) would also be constant. The voltages sound roughly correct. If you turn the speedo sender with a drilll (on high speed setting) there should be some indication on the speedometer (cant tell you what as I have not actually checked on mine - its too wet outside :-( Is the signal wire intact (the wire with the 8V reading) back up to the loom on the gearbox (the 8V is generated in the sesnsor)? Dave

Typically its 150K or 160K for most Toyota. The light will come on when its due (provided the bulb is OK). It was 160K km on my 1KZ-TE engine. Dave ENG-TEK - Diesel Engine Performance Centre

Used have a 2.0 litre (18R engine) 'lux - that would go side ways in the wet too, but struggled on the slightest grade! Try the 4.0 V6, or the new TD (if you tow). That'll make ya rethink the 2.7L performance.

Unfortunately the 'HIR' globes dont fit earlier models :-(( Most recent Toyota vehicles (say 1990 onwards) will benifet from a wiring loom upgrade - even if you use standard power globes. Higher wattage globes will benifet even more. Those in doubt should check the voltage drop from the battery to the globe on high beam. The power loss is the square of the of the difference in voltage. There are several paces manufacturing them for those who dont want to make their own loom. Dave

The new model Hilux takes into the 21st century compared to the prior model - from and engine perspective. The new 3.0 litre Turbo Diesel is 120Kw, and 343nm from below 2000 rpm to over 3000rpm. The V6 petrol is straight from the 120 series Prado, with over 175kw on tap. If thats not enough from the TD engine, just add a Diesel Tuning Module and boost it to over 140kw and over 400nm in under 30 minutes. That makes it quite sporty, and even has a weight advantage over the bigger 4x4's too boot. The petrol is no slouch either, but moves along a bit better with a set of (custom) extractors. Opening the exhaust system helps both engines even more. Reports are that some offroad ability has been lost on the (ex factory config), but I guess that the same applied to the previous model too, after moving away from a solid axle configuration. OME are supposed to be addressing the suspension issue right now. Dave

Sounds a bit on the heavy side for consumption., unless the trailer is an air foillll. On LPG I tend to get about 5km/L under normal use, and down to 3.5km/L if doing interstate with 3T trailer at the speed limit all the way (Adel or Sydney). I dont know what it does on petrol, but would expect 15% better. A friend did trip to QLD and managed 3Km/L average with 3T trailer.(after accounting for dif size tyres). He had 33" tyres for the trip (down from 35"). Drag is the biggets issue - minimise that and fuel economy will improve (remove roof rack)s. Do you have oversize tyres - even 33" make a difference to economy over the factory 31". Dave not so slow 80 series