What type of oil should I use in a 2000 VW Golf?

Don't have an owners manual, and it doesn't say on the cap/under the hood.

2000 VW Golf GLS 1.8L I believe



Thanks!What type of oil should I use in a 2000 VW Golf?use 10W-40 in the summer months. The rest of the time use 5W-30.What type of oil should I use in a 2000 VW Golf?10w 40 or if your like me try a 15w 40 oil