[T3] Stupid question #395 Oil change time?

[William Jahn]

Forgot since I don't really every drive far and long enough perhaps SAE30
is good enough since it's really all about flow. I did read at several
sites that you cna't mix say 20W50 with 10W40 because of the molecular
structure is different that makes up the viscosity of each grade. If true I
did mix 1 pint of 10W40 in because I was short on 20W50, who knew..

On Sat, Jun 1, 2019 at 7:58 PM William Jahn <willjahn975 at gmail.com> wrote:

>  I do understand that SAE30 might be better than SAE40 . I don't see any
> white buildup in the breather. I do seem to hear a bit more tappet noise
> since I changed the oil  unless I'm just much more focused it. When I last
> adjusted the valves 5/30/15 around the same time I last changed the oil all
> the rockers had oil in them, I pushed them down to see if the valve
> clearance was was @.006". I suppose when I change the oil again within the
> next week I should pull the valve covers just to check it out in there. On
> the SAE30 I see a few different charts most agree SAE 40  the low end temp
> is 50* F and high end is 113 to 122 *F. they seem to indicate that SAE30 is
> good to around 100* F .
>
> On Fri, May 31, 2019 at 10:56 AM William Jahn <willjahn975 at gmail.com>
> wrote:
>
>> The odd part is all sites have reviews and there is not one on the STP
>> brands autozone sells so people either don't bother with reviews since it's
>> all BS or just use the STP and are happy with it. I just feel Valvoline is
>> what it is so I went with that.
>>
>> On Fri, May 31, 2019 at 10:51 AM William Jahn <willjahn975 at gmail.com>
>> wrote:
>>
>>>  Jim, I imagine SAE 30 would have been fine I never used 30 in this
>>> engine which doesn't mean anything. I was more concerned of how hot it does
>>> become here. The way the traffic is here there is not a time when I can
>>> drive above 45 MPH , even on a freeway you might get to 55 or 60 for a mile
>>> or 2 then it's stop and go. Just to get on a freeway I need to drive 6
>>> miles stop and go. I realize it's the starting that produces the most wear.
>>> I was watching my oil temp and pressure gauges just glancing once I had
>>> driven 5 miles 2 days ago on this 20 mile round trip and noticed the temp
>>> climbed more as I was at idle since there is not a lot of cooling air
>>> flowing plus ambient temps rise from the heat off all the cars all around
>>> me. I fell for the misconception that multi grade oil became thicker when
>>> it does not so I can't say only assume that the 20W50 was in a sense lower
>>> than SAE 30. I saw the same thing searching O'Reilly's site that they  have
>>> their own brand and saw a video of one fellow talking about house brands
>>> are most likely branded name brand oil which is probably the relation
>>> between Autozone and STP which is close to half the price on any name brand
>>> oil they sell. If it is in fact good oil then I have a easy choice to go to
>>> SAE 30 if needed. Fact is thinking about this I only recall using Castrol
>>> 20W50 twice and this was when Autozone stopped selling Castrol SAE 40 and
>>> STP is a fairly new addition in Autozone's oil selection didn't see it on
>>> their site until this year. Perhaps enough people wanted SAE 30 and 40
>>> since they took it away years ago. I'd much prefer walking into a FLAPS and
>>> purchase than having it shipped. I have 3 quarts of Valvoline 10W40 haven't
>>> used it. Felt it might not lube well enough  and from what I've read " Generally
>>> it's better to stay away from the 10W-40s, as they have a higher content of
>>> long-chain polymers to get the 40 rating from a thin base, and the polymers
>>> are not lubricants themselves." I got this info from here.
>>> http://www.vw-resource.com/engine_oil.html   for what it's worth.
>>>
>>>  I don't know why autozone used the STP name , they used have an
>>> autozone brand name oil and perhaps placing the STP brand made it more
>>> trustworthy and as far as I know it very well may be the same autozone
>>> brand oil in a paid for STP labeled bottle.
>>> "
>>>
>>> On Fri, May 31, 2019 at 6:54 AM Jim Adney <jadney at vwtype3.org> wrote:
>>>
>>>> On 30 May 2019 at 16:00, William Jahn wrote:
>>>>
>>>> > I found out that the STP SAE30 & 40 are made by autozone by calling
>>>> STP
>>>> > autozone gets to use their trade mark for a price. STP only deals with
>>>> > their additives.
>>>>
>>>> And Autozone oil is probably made by some major brand that we would all
>>>> recognize.
>>>>
>>>> I once had to make an emergency oil stop at an O'Rileys and was faced
>>>> with
>>>> a bunch of O'Rileys oil that I'd never seen before. The guy at the
>>>> counter
>>>> told me that it was all actually Valvoline, same oil, same additives.
>>>> He'd been
>>>> to the factory and watched the same oil, just put into different color
>>>> bottles,
>>>> coming down the line and put into different cartons. I suspect that all
>>>> house
>>>> brand oil is done this way. It could even be different makers done
>>>> under
>>>> different contracts in different years. It sounds like they are allowed
>>>> to talk
>>>> about this fact but not advertise it.
>>>>
>>>> I used to work with a guy who serviced big industrial air compressors.
>>>> He
>>>> managed to spec his own oil and get someone to mix and package it just
>>>> for
>>>> him. I suspect that oil came in 5 gallon buckets with a minimal label.
>>>> Or
>>>> maybe he had to buy 55 gal drums. I should ask him.
>>>>
>>>> --
>>>> *******************************
>>>> Jim Adney, jadney at vwtype3.org
>>>> Madison, Wisconsin, USA
>>>> *******************************
>>>>
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>>>
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