I would consider anything less than nominal operating temperatures a "cold start".
Granted, starting an engine at 30°C is less stressful than starting up at 0°C, but you're still more than 60°C away from nominal operating temperatures - when the engine is designed to be most efficient.
Similarly, I would also consider any trip, where nominal operating temperatures are not reached before stopping the engine, a short journey.
Regarding service regimes, here is some information from VW's 504/507 oil brochure;
LongLife Regime - variable, up to 30 000 km or 24 months
To obtain the most benefit from the LongLife service regime, the car should to be generally driven
in a style/condition of use listed below:
• Mainly longer distance journeys
• Limited number of cold starts, engine is kept at operating temperature over a longer period of time
• Daily mileage above approx. 25 miles (40 km)
• Constant speed
• Vehicle used regularly
Do I have to use LongLife oil all the time? (i.e. 504/507 oil)
Yes. If you want to take advantage of the LongLife service regime. Please note that if the engine
is topped up with more than 0.5 litre of non-LongLife oil (i.e. 502/505 oil) between services, the
service indicator will come on earlier and the time or distance between services will be reduced.
Time/Distance Regime - fixed, at 15 000 km or 12 months
If your car is driven in a style if listed below, it may be more appropriate to opt for the Time and
Distance regime:
• Extremely uneconomical driving style i.e. continual maximum acceleration i.e. ‘foot to floor’
• Vehicle fully loaded
• Mainly short journeys
• Frequent cold starts
• Frequent hill climbs
• Frequent towing
• City centre driving
(Click here for full document)
I believe all Australian delivered vehicles are setup to use the Time/Distance Regime, so don't worry about LongLife Regimes and 30k service intervals. BTW, unleaded 95 and 98 petrol in Australia is allowed to contain up to 5 times the amount of sulphur than is currently allowed in Europe (50 ppm vs 10 ppm) so no one will be able to achieve 30k here in any case.
Instead, use the above information to help you determine whether it would be beneficial to change the oil more frequently. If you drive your vehicle according to the conditions listed under "LongLife Regime", consider a 15k/12m service interval more than sufficient.
On the other hand, if you more fit the profile according to the conditions listed under "Time/Distance Regime", then you may consider a 7.5k/6m oil change interval, which is again more than sufficient (just ask the dealer/workshop for an oil & filter change - not a service).
As always, I recommend using 504/507 oils whenever possible, even on a 7.5k/6m OCI.
But it is a marvel of engineering that under the right conditions, these engines, when used with correct lubricants, are capable of very long drain intervals indeed.
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