Starmer & Lammy A Marriage Made In...
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No best answer has yet been selected by astraman. Once a best answer has been selected, it will be shown here.
For more on marking an answer as the "Best Answer", please visit our FAQ.Short journeys mean the engine doesn't warm properly, condensation in the block, water + oil = mayonaisse. Would seek advice from proffessinal though, ask about a pressure test on the system. Check the water bottle (engine not wipers!) for mayo as well. Sounds like no great problem, but I would suggest taking the car for a decent run, motorway 30 miles or so each way, to give the engine chance to clear.
You don't give many details about your car but when I had an astra 1.6 GLS 1995 I had the same problem which was easily cured.
All year round I blanked off 30% of the radiator, in winter I blanked off 60%, most vehicles are over cooled especialy Astra's but just keep an eye on your tempature gauge if you get stuck in traffic or do fast Motorway journies. The thick goo will soon disappear.
I am sure you can disreguard all the doom ridden answers.