Timing ? CAMRY 4

If you want to get high fuel efficiency, it sounds like you need to change your driving style. 'Working it up the rev band' is costing you more in fuel than is friction in the engine or slight variations in engine timing. This engine thrives - and sips fuel sparingly - when run gently.

I used to use Mobil 5-30 and now use 0-30 M1, I notice a difference. Timing shouldnt change in 35000, mine didnt change until the belt was real old but checking timing is easy to do and you dont know for sure it was ever done exactly, When my timing was retarded 3 degrees, on an old stretched belt with maybe 70000 on it, I had a major loss in power and 3-4 mpg loss. You can advance until there is nock but hearing any is not easy, I go 1/2 degree further and have been safe. Noise is likely wear from age and hard driving.

Hi there,

I think you kind of misunderstood my "up the rev band comment " I just meant while over taking or indeed general use. Not just flooring the pedal for the hell of it lol.

I have had the car near 14 years now it has been well looked after in that time.

My fuel returns if I am on longish runs here which are 450 mile return trips . Come in around 34/35 mpg. But motorway traffic here does run at 70/80 mph in most cases. Around town maybe 24/25 mpg.

So I am not a boy racer lol ( I am just on 76 years now )

Johnny UK

I used to use Mobil 5-30 and now use 0-30 M1, I notice a difference. Timing shouldnt change in 35000, mine didnt change until the belt was real old but checking timing is easy to do and you dont know for sure it was ever done exactly, When my timing was retarded 3 degrees, on an old stretched belt with maybe 70000 on it, I had a major loss in power and 3-4 mpg loss. You can advance until there is nock but hearing any is not easy, I go 1/2 degree further and have been safe. Noise is likely wear from age and hard driving.

Hi,

Its never been driven hard really. More average use. On the point of it not been set up correctly when the belt was changed. I seem to have less faith in folk doing jobs for me now. It seems there is less and less pride in doing a GOOD JOB these days. And I don't think main dealers are any better.

I realise its easy checked but I did not feel like spending an a Timing strobe for just the occasionally time I may need it.

But all comments absorbed Thanks

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Johnny UK

Trying to squeeze more miles out of an already economical engine is like trying to up the hp on an already high hp engine. It can be done but it gets expensive, if you are getting over 30/mpg highway that's pretty good. Advancing the timing may add a little bit, but varying qualities of fuel can lead to possible engine knock. Anyone remember the octane selector on the old Toyotas? There was a little knob on the distributer and you could turn to bump the timing forward or backwards. I changed my timing belt less than a 1,000 miles ago and I didn't notice a bit of difference between the new and the old.

Understood. Are you calculating using the larger Imperial gallons? If so, you might want to consider that I get the same economy figures with the smaller American gallons...