conventional oil for VW 2.0

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1,050
Location
Calif.
Yeah I know many people recommend to use full synthetic for the VW. I got a 02 VW Jetta GLS 2.0 so its not a high performance engine and I don't think synthetic is required for this engine. I would like to do 3000-5000 intervals using conventional oil. So which do would you recommend me to use? 5W-30, 10W-30, 10W-40, 15W-40, 20W-50? By the way the car doesn't consume too much oil. I was thinking about using 15W-40, but not sure if it will really drop my gas mileage or affect catalyst activity. Thanks for any replies.
 
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764
Location
Fairfield County, CT
With your climate (never gets below freezing, correct?), I'd go with a good 10W-30 year 'round, something like Chevron Supreme or Pennzoil w/Purebase. And use original VW oil filters, they're probably made by a good company like Mann or Mahle.
 

huffmuds9320

Thread starter
Messages
1,050
Location
Calif.
Doesn't get very cold here in SF, lowest probably in the 40s, and highs around 70s. The thing I wanted to get clarify is that if I use thicker than what they recommend, I heard something like it will not lubricate that well. And using a 10W-30 instead of 5W-30, would it reduce my fuel economy? Yes I use the Mann filters which is just like the VW OEM.
 
Messages
1,130
Location
California
Chevron 10W-30 is readily available here in No. California and should work very well for you. I highly doubt that you will see any difference in fuel economy between a 5W-30 and a 10W-30. In theory they are both the same viscosity once at operating temperatures. The 10W-30 is likely to be a little more stable than the 5W-30, which is a good thing with the relatively small oil capacity of the VW. Costco stocks Chevron Supreme by the case if you are so inclined. John
 
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11,247
Location
PA
Any 15w-40 works. My BOSCH Mechanic uses Castrol RX 15w-40 in all cars that do not get Syntec 5w-50. Pennzoil LL 15w-40 was my pick for a friend's neglected 2001 VW 2.0.
 
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23,591
Anything but conventional 5W-30... About ambient temps in SF: we do get easily 90 degrees here in the summer. If you go to Marin, Sonoma, and Napa, you'll encounter over 100 degrees. [ May 15, 2004, 12:55 AM: Message edited by: moribundman ]
 
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2,946
Location
Georgia/Retired
Here is what the factory service manual specifies for your 2.0 liter Jetta: When using energy conserving oils (ie: friction modified): For all temperatures: 5W-30 5W-40 10W-30 10W-40 When using non-energy conserving oils: For all temperatures: 5W-50 10W-50 10W-60 For temperatures below 15º C: 5W-30 5W-40 10W-30 10W-40 For temperatures above -5º C: 15W-40 15W-50 20W-40 20W-50 These viscosities are directly out of the VW factory manual. I would use a 10W-30 oil that has the 'energy conserving' mark in the API label - most likely I'd choose Pennzoil but that's just a personal preference. Don't forget to do your 2 year brake fluid change since you're at the 2 year mark.
 

huffmuds9320

Thread starter
Messages
1,050
Location
Calif.
I guess I will use 10W-30 for this car, since other car uses 10W-30 a case of oil for both cars. Hey thanks for the reminder of the 2 year brake fluid change. The manual doesn't really make it clear on what other choices to use. Just says that the car was filled with 5W-40 and that you can use 5W-40. Then on the bottom says if 5W-40 or 5W-30 was not avilable, then use any oils that works for your environment. Thanks for the above list, really gives an idea what is for the car. Factory manual must have a lot of information and goes beyond the user manual. The Mobil 1 and Castrol oil finder list a limited selection and different reccomendation. Better trust the list from the service manual. Again thanks for all the suggestions and advice.
 
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