I have a Nissan Xterra 2008 with the VQ40 engine, I normally run 5w30 oil in the car as per the owners manual, well today I changed the oil and after I did, I realized that somehow I accidently put 5w20 weight oil in the engine. I am using Penzoil Platinum sythetic and the car has 14,000 miles on the engine. I do alot of city driving and alot of highway. DO I need to drain the oil ASAP and put 5w30 in it? BTW I have to leave and go do some work in about 30 minutes or so.