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post #1 of 7 (permalink) Old 11-03-2008, 09:58 AM Thread Starter
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Best Oil For The A4

I am preparing to have the oil changed for the first time on my recently purchased used A4. However, I am not sure if the previous owner used regular oil or synthetic oil in the engine. I would like to use Mobil 1 synthetic oil in the engine; do you advise using an engine flush before changing to synthetic oil? I used this method, when converting from regular oil to synthetic oil on my Honda Accord. I have been advised to use W 0-40 oil…is this better than the recommended viscosity of W 5-40?

2000 Audi A4 1.8T Quattro
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post #2 of 7 (permalink) Old 12-12-2008, 04:40 PM
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it always up to you but best for you will be go for 10w40
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post #3 of 7 (permalink) Old 12-13-2008, 08:10 AM
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If using Mobil One (or any other oil), it should be VW 501-502 compliant. The only Mobil One meeting that is 0W-40 European Formula. Castrol has just recently released a VW 501-502 spec in their synthetic line.

The VW 501-502 is to avoid sludge problems due to some rediculously small passage ways in the engine. FAILURE TO USE THIS VW 501-502 OIL WILL VOID YOUR WARRANTY! I have a fellow sales rep at my firm that found this out the hard way. Yep, spun two bearings! VW asked for oil change reciepts and found none of the oil used at the quick change joint she used was VW 501-502 spec.
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post #4 of 7 (permalink) Old 12-14-2008, 07:59 PM Thread Starter
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I changed my oil a few weeks ago to Mobil 1 0W-40 with a mann oil filter. Do you recommend using a thicker viscosity oil during the summer?

2000 Audi A4 1.8T Quattro
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post #5 of 7 (permalink) Old 12-16-2008, 07:45 PM
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I don't on my 2006 2.0T. The 0W-40, being a multi viscosity, will become a 40W at higher tempertures. However, I'm no expert, especially when talking about your era 1.8T, so.....I'd check your manual, or look around e-bay to find a manual if you don't have one. In the meantime, using the oil you just put in is probably good insurance as it will definitly be as good or better than what is called for. The only down side is it might be more expensive than something else that might be specified for that engine.
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post #6 of 7 (permalink) Old 12-24-2008, 08:28 AM
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I use Castrol Syntec 5w-40 (European Car Formula) in my 97 A4 1.8T. I found a list of after market oils suitable for the engine on the net. The list was put together by VW engineers and mostly consists of 5w-40s and 0w-30s. Can't remember where I found it, but I printed it out and keep it with my manual in the glove. I did notice the last time I bought a few quarts the bottles no longer said "European Car Formula" on them, but it was still Castrol Syntec 5w-40.
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post #7 of 7 (permalink) Old 12-24-2008, 09:17 AM Thread Starter
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I found that list a few weeks ago but I didn't print it out. However, the service manager at my local Audi dealership advised to use 5w-40 Castrol Syntec or Mobil 1 0W-40 with an OEM filter. The Mobil Ow-40 bottle states for use in European cars.

2000 Audi A4 1.8T Quattro
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