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VW Jetta Basic Maintenance Questions (Oil changes, fluids, etc.)
182 messages, Last post on Dec 17, 2011 at 1:03 PM
You are in the Volkswagen Jetta Forum.- Your Hosts are Kirstie@Edmunds & Karen@Edmunds
What is this discussion about? Volkswagen Jetta, Oil, Diesel, Sedan
#181 of 182 Re: Synthetic Oil [creece89] by bpeebles
Dec 13, 2011 (9:31 am)
Replying to: creece89 (Dec 13, 2011 8:54 am)
You may safely add SYNTHETIC oil to your crankcase. It is OK to mix with dead-dinosaur oil. HOWEVER: you have bigger problems. You need to figure out why your engine is consuming oil. Notice I did NOT say "burning" oil.... because at this point, we have no clue if the oil is being burnt or simply leaking.
To answer your other question: NO, the use of dyno-oil in your engine a couple times will have no measurable affect on it.
The technical reason your turbocharged engine should run synthetic oil is to protect the bearings in the turbocharger from heat-soak. Heat-soak will cook the stagnated oil in the bearing leaving behind abrasive soot (aka coke). This ONLY can happen if you shut off your engine without idling for a minute or so to allow the turbocharger to cool off.
Synthetic oil is highly resistant to getting cooked due to heat-soak. Since you own a turbocharged engine, I am sure you are aware of the 'special' needs of a turbocharger. With this knowledge, many folks run dino-oil for the life of their engine with no ill ffects.
#182 of 182 Smog Check California Diesel 2010 TDI by ggeeoo
Dec 17, 2011 (1:03 pm)
I took my car to a Smog Check station (Jetta TDI 2010 Sportswagon Diesel) The owner and friend showed me a notice that it was not required. The DMV thinks otherwise as they have sent me a notice to the contrary. I looked up the answer my friend was wrong . The Smog station must make a visual inspection under the hood and certify no black smoke from exhaustpipe. The operator of the Smog station does not hook the car up to the Dynometer however.
This law went into effect on 1/1/2010.
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