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· Registered
2004 GLS 1.8T
12,197 Posts
1. The difference in pressure consequential to oil weight is too small to be significant. If you have poor pressure with too-thin oil, it still won't be good with the right oil.

2. That's odd - the oil pressure warning is supposed to be disabled at low RPM. Something electrical? Regardless, start with measuring the actual oil pressure with a mechanical gauge. Avoid driving until you confirm safe oil pressure.
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