Last post on Oct 02, 2013 at 6:59 PM
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#8935 of 8944 Re: Now I'm scared follow up [eladoj]
Jul 03, 2012 (10:43 pm)
Have you run oil analyses on the oil at change to determine whether wear metals and TBN were within tolerable limits? Those are primary factors in determining the suitability of oil.
I suspect that the 15,000 interval for M1-Extended is a safe bet by the manufacturer in lieu of analysis. In other words, one could use the oil at that interval in most vehicles and expect that were it to be analysed after 15K, it would be readily protecting the engine. Beyond that and the specific application, quality of filtering, etc., would play roles in how long it would last before protection diminished.
Sep 10, 2013 (6:27 pm)
The car: My daughter's '02 Jetta 2.0 with ~81,000 miles.
The issue: Two types of oil approved by VW for this engine are Mobil 1 5W40 and Castrol synthetic 5W40. My daughter took her car to a local gas station for an oil change and asked for synthetic. No other instructions. The old Castrol oil was replaced with Duralene 5W30 full synthetic. I'm not familiar with this brand so I don't know the quality of this product.
After having been driven about 1,400 miles since this oil change the level is down about 1/3 quart. That's normal for this car.
Question: I have a supply of Castrol 5W40 synthetic. Would it be okay to use the Castrol to bring the level to the "full" line sometime before the level gets to the "add" mark? In other words, would mixing oil brands damage the engine or cause adverse effects? It would be convenient, since I already have the oil, but I don't want to cause any harm. Please advise.
#8938 of 8944 Re: Mixing Motor Oils [hpmctorque]
Sep 11, 2013 (6:20 am)
Not a problem to use those two oils together. However, being down 1/3 qt. is not a concern. You're fine just as it is.
#8939 of 8944 Re: Mixing Motor Oils [shagnat]
Sep 11, 2013 (6:30 pm)
Thanks. I'm just planning ahead on what to do when the dipstick reading is close to the "add" line.
Sep 12, 2013 (1:31 am)
What do you think about topping off the Duralene 5W30 full synthetic that's in the crankcase with fresh Castrol 5W40 full synthetic that's approved by VW for use in the 2002 2.0 engine?
I already have cans of the Castrol, so it would be convenient and economical to use it if mixing the Duralene with Castrol doesn't harm the engine.
#8941 of 8944 Re: Ruking1 and Shipo [hpmctorque]
Sep 30, 2013 (4:09 pm)
I'm a little concerned that the car is supposed to have 5W40 and the shop put 5W30 in it. 30-weight oil is quite a bit lighter than 40-weight.
#8942 of 8944 Re: Ruking1 and Shipo [xwesx]
Oct 01, 2013 (4:08 am)
The weight or Viscosity is not as important as the specification requirements that the engine oil must meet. different viscosities can be used depending on temperature conditions you live and drive in...and the manual usually states what the recommended or the all temperature viscosity should be...
First thing to do... verify in your owners manual as to the spec needed for your vehicle.......depending on what car it is , will make a difference as to the spec....it may be a API, or MB or V W.....I dont know what make and model you have....but the maunal will state the spec requirements
next check the spec of the 5w-30 oil the shop used....you can ask them, if you dont know......did the oil the shop used meet the spec ? If so, I wouldnt worry about it. But if not, the shop needs to know, and should change out the incorrect oil to a correct spec oil..........
Recently a new law or requirement has been adopted in many states. the new requirement calls for the shop, quick lube, dealer or other to state on the receipt, the brand, the viscosity and the spec of the oil they installed.....
I know for a fact that many, many, many shops use 1 oil for all cars..which is harmful if the oil does not meet the spec required....
With the variety of auto manufacturers it is difficult but necessary for installers to have a variety of oils on hand, due to the variety of specs needed today....seems like every manufacturer is requiring their own spec....
there is GM's Dexos spec and other specs by GM....Mercedes ben,z MB specs......VW specs.....diesel specs....Ford specs.....and etc....your owners manual states the spec...the oil used must have the spec on the back of the bottle...
So, next time you get an oil change, know what spec your car needs and tell the shop....to get your piece of mind.....The spec can also be met in a varitey of viscosities. Thats why the Viscosity whether a 5-40 or 5-30 is not nearly as important as the spec requirement............Hope this will help
#8943 of 8944 Re: Ruking1 and Shipo [xwesx]
Oct 02, 2013 (6:58 pm)
#8944 of 8944 Re: Ruking1 and Shipo [vipasynthetics]
Oct 02, 2013 (6:59 pm)