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[Omega man 2]

Ok, I've just got my mig roadworthy after fitting new rings, valves, and conrods. The manual says "the engine should be treated as new and run in for 500".

If this period determins the life of the engine, how should it be driven?

[pscocoa]

I have just had a new engine and the real focus is on keeping the revs down and not pulling away from standing in too much of a hurry.

Change oil and filter at 1000 miles.

[redelitev6]

Don't let the car labour up hills

[HolyCount]

Ok, I've just got my mig roadworthy after fitting new rings, valves, and conrods. The manual says "the engine should be treated as new and run in for 500".

If this period determins the life of the engine, how should it be driven?

Balance an apple on the bonnet and drive as though you want it to stay there !!!!

[Auto Addict]

Don't drive it at a constant steady revs., vary them constantly, without over reving.

[Del Boy]

Don't drive it at a constant steady revs., vary them constantly, without over reving.

As AA said  

[Kevin Wood]

If new rings have been fitted I'm of the opinion that it does need careful running in over the first 50 miles or so. Ragging the bejesus out of it is not a good idea. Treating it with kit gloves is worse IMHO.

You need to give it some short bursts of full throttle up to at least the torque peak RPM (4,000 RPM or so) so ensure the rings do get bedded in, but only for a few seconds at a time, with periods of overrun in between to suck oil up through the rings, cooling them and ensuring they are well lubricated. Avoid long periods of idling.

Once this is done, avoid high revs (say over 5000) for the first 500 miles, avoid labouring the engine at low revs but within these limits, subject it to a range of speeds and loads.

Treating an engine with new rings too gently can allow the bores to get glazed before the rings have had a chance to bed in. You'll then always have poor oil consumption.

Kevin