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AudiLee
03-21-2012, 08:29 PM
The previous owner of my car used fully synthetic 10w-40 for my audi and i've been doing the same. But i've seen people use 5w-40, which is the correct oil? Btw the car is an audi a4 1.8t

ianwpb
03-21-2012, 09:10 PM
IIRC 5w40 and 0w40 are the only VW 502.00 approved oil viscositys. Lots of people use other types though.. It just depends on the weather you encounter. 5w40 is good for a very wide range of temps. 10w40 would probably not be good for areas with freezing temps. It's more of a higher temp oil.

You can't go wrong with Castrol Syntec 5w40. For a cheaper option Shell Rotella T6 is highly recommended by people around here.

The search function is your friend along with google.com

AudiLee
03-21-2012, 09:26 PM
i live in the bay area so its not really freezing, is it still okay to use 10w or should i switch immediately?

Seerlah
03-21-2012, 09:43 PM
http://www.my-gti.com/2543
http://www.my-gti.com/2528

FWIW, I use an oil not on that approved list. I use Amsoil 0w30 Signature Series in the Winter, and Amsoil 5w40 Euro Blend in the summer. As soon as my next oil change comes around, I'm switching to Amsoil 5w30 Euro Blend all year round (5w40 Euro Blend currently in my car).

auh
03-21-2012, 11:10 PM
Rotella T6 5w 40 synthetic FTMFW @ $20 a gallon

QuattroGinger
03-22-2012, 04:44 AM
I've never used anything other than mobile 1 0w-40. My car loves it year round. Make the switch

2.7taudi
03-22-2012, 04:45 AM
i live in the bay area so its not really freezing, is it still okay to use 10w or should i switch immediately?

On the 1.8 I would use Audi recommended oil due to the sludge issues. Mobile one 0w-40 is the best. I just asked this over at bob is the oil guy about switching to 5w-40 in the summer and all of them said 0w-40 would be best year round. Although 5w-40 is also a good oil. Change the oil when on its next oil change to a Audi recommended oil (5000k miles or less)

M-Hood
03-22-2012, 09:09 AM
First number is for start up, lower number is needed for cold conditions and higher number for warmer conditions. You want a higher weight 2nd number for hotter weather conditions when driving the car, if it isn't high enough your oil temps will rise quicker then they should and if the oil weight is too high the temps will always be below the normal running temp. So you have to choose the correct weight oil for your condition not what others use in other parts of the country/world. If night temps don't get too cold and outside temps are just warm when driving then a 5w30 or 10w30 is plenty, for hotter weather conditions a w40 would be a better choice.

I run a 5w30 since my car is only used at the drag strip, I plan on switching to a straight 20 weight race oil since my oil temps never really get close to 200F. The lighter the oil the less drag there is on the turbo shaft which means quicker spool and more power.

Sorry 2.7Taudi but Mobile 1 isn't the best oil, not even close. No point in using 0w if you never see freezing temps.

GOODBYNAAIR
03-22-2012, 02:14 PM
M hood I live in MD been running mobile 1 0w-40 over the winter we see mid temps of 20 to 40 most of the time. so I should go to say royle purple 5w-30 over the summer?? we see 80 90 temps over the summer would this be a good example for my area ?

ianwpb
03-22-2012, 03:48 PM
M hood I live in MD been running mobile 1 0w-40 over the winter we see mid temps of 20 to 40 most of the time. so I should go to say royle purple 5w-30 over the summer?? we see 80 90 temps over the summer would this be a good example for my area ?

Go with a 0w30 for the winter and a 5w40 for the summer since the east coast CAN get hot. You guys in MD actually have higher record temps than I do in South Florida believe it or not..

AudiLee
03-22-2012, 06:21 PM
i've been using fully synthetic 10w-40 for about 3,000 miles is that bad? anything i should be worried about?

2.7taudi
03-22-2012, 06:32 PM
i've been using fully synthetic 10w-40 for about 3,000 miles is that bad? anything i should be worried about?

That's too thick for cold starts IMO for our cars. But nothing that will cause your engine to fail. You can keep using it but if you don't want to go by Audi recommended oil you can use 5w-40 shell rotella in winters and 10-40 in summers.

AudiLee
03-22-2012, 06:40 PM
if i used 10w-40 over the winter, for about a 200 miles is there anything i should be worried about? and what oil should i be using during spring?

2.7taudi
03-22-2012, 06:57 PM
if i used 10w-40 over the winter, for about a 200 miles is there anything i should be worried about? and what oil should i be using during spring?
Nah nothing to be concerned about. If you are really concerned about your so much switch to mobile 1 0w-40 or valvoline or castrol 5w-40 all those are Audi approved and easily Accessable and can be used year round.

M-Hood
03-22-2012, 07:46 PM
if i used 10w-40 over the winter, for about a 200 miles is there anything i should be worried about? and what oil should i be using during spring?

You will be just fine seeing you live in Norcal not Alaska.