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Re: [GMCnet] Engine oil, which viscosity is best? [message #212373] Wed, 26 June 2013 15:25
hnielsen2 is currently offline  hnielsen2   United States
Messages: 1434
Registered: February 2004
Location: Alpine CA
Karma:
Senior Member
Same here Mobil 1
Three or four years ago coming west in to Grand-junction Co our oil sending unit broke off.
Lost all the oil.
Susie was driving at the time.
She was able to "man handle" the GMC in a Chevron truck stop.
I added 6 qt of Chevron?
Drove on to daughters home in Henderson
Cleaned up engine and changed oil back to Mobil 1have never had an engine problem.
I emailed Mobil.
Mobil came with a thank you and we where not the first ones saved by Mobil 1
Howard
74 Canyon Lands

All is well with my Lord

On Jun 26, 2013, at 11:55 AM, LW <tux@apex-internet.com> wrote:

>
>
> emerystora wrote on Wed, 26 June 2013 13:06
>> Chris
>>
>> Bear in mind that the original manual is now about 35 to 40 years old depending on the model year you have.
>> The oils listed in it were available 40 years ago and the modern oils available today were not being made back then.
>> So, you should be looking at other oils than the 10w30 listed in your manual.
>>
>> I use Mobil 1 15w50 which is a synthetic and I have been using it for over 10 years now with no problems in my 455 engine.You will get other suggestions from other GMCers and there are a lot of oils out there that will work. I do suggest that you consider synthetic oils through and they have a lot of advantages.
>>
>> Emery Stora
>> 77 Kingsley
>> Frederick, CO
>
>
>
> Hi Emery,
>
> Is there a reason you would NOT recommend 10W-30? I definitely understand that oils have changed over the years, and that's why I posted this question. :) My understanding is the Amsoil Z-Rod 10W-30 is a direct replacement where conventional 10W-30 was recommended in older engines.
>
> Thanks!
>
> Chris
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