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Originally Posted by Piwoslaw
Now there'll be more short trips around the city, some maybe at short notice.
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In that case I'd switch to 0w30 - if you can find some at a reasonable price.
Over here, same quality oils are similarly priced , regardless of weight.
Doesn't mean these fully synth oils are cheap though.
In the manual, Volvo specifically list 0w30 as the preferred oil under
unfavourable conditions.
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I read some more about Total's 5w30 and 0w30 oils and found out that the 0w30 has more sulphur in it, which disqualifies it for DPF and EURO4 diesels. My old lump is non-DPF EURO3, so it should be OK.
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I'd use one of the low-sulphur 0w30 oils available.
Sulphur oxides are very harmful, less sulphur content (oil or fuel) in a combustion engine is a good thing.
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In fact, the engine seems more reluctant to start after warming up when I kill it at a red light 
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That'd be weird for a diesel.
Does it have to crank harder or ???
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Maybe there is an electrical load which the alternater can't keep up with?
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It could be, but why would it start better during a cold start ?
If the battery isn't recharging sufficiently during driving, it likely won't be sufficiently charged at the end of a trip either, would it ?
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The problem with the A/C is that the refrigerant has leaked out (again ). It takes about 2 months to leak out after recharging.
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If you ever get it refilled, have them put in some UV-reactive leak finding fluid as well. It stains the area around the leak.
Volvo puts it in as standard (marked as such in the vicinity of the refrigerant), maybe Peugeot does as well ?