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SLmateo

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I'm about to change the oil soon for the upcoming warmer weather in the truck and I'm wondering to use 10w30, I'm using 0w30

To my understanding both have the 30 so the warm thickness will be the same but cold engine 0w30 will be thinner and flow better at startup.

Am I missing something or is 0w30 just the best for any weather as it provides the best protection in any weather startup...??

I've used 0w30 for the last few years and thought I'd ask... I barely ever tow in this one.
 
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0w30 is supposed to be for brand new engines that have extremely close tolerances, not 20 year old pickups. I hope you have good oil pressure. if you do then I would run no thinner than 10w30 any time of the year and slightly thicker during the summer if your oil pressure drops off on hot days, like 10w40 or even 20w50 if its bad.
 
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SLmateo

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I believe it's normal right now 40 ish warm at idle right now and higher when cold start.. thanks I'll prob just go with 10w30 over the summer and watch it
 
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GM recommends 10w30 all they way down to 0'F. 5w30 if colder than that. They built the engine, so they know what it needs. Thats how I look at it.


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SLmateo

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Understandable but wish they'd "update" as I feel even though it's still good, I feel, with the time lapse and improvements in technology and synthetics there is a better option even with the same engine... might be wrong though
 
21Actual

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Absolutely! ^^ I still personally follow the oil weight they recommend, but I use a quality full synthetic. It is in every way superior to conventional, except the price. The price is certainly not superior.
 
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For both my vehicles (98 5.7 Vortec and 2008 Mustang GT) I use Mobil 1 Full synthetic, and I follow the factory recommendations for viscosity. The truck has 86,000 miles, the Stang, 55,000, and both perform beautifully, with good oil pressure, no oil burning or leaking, and very quiet engine mechanicals.

The price is higher than for conventional, but on sale at places like Wally World, or Crappy Tire (Canada), it comes down to around $6 or $7 a litre.

I don't drive either vehicle much, so I change once a year. I always make sure I drive the vehicles until they are fully warmed up, and use a new filter each time. I've been doing this kind of thing all my life, and I've always had excellent service from my cars and trucks, with no engine failures or serious issues.
 
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SLmateo said:
I'm about to change the oil soon for the upcoming warmer weather in the truck and I'm wondering to use 10w30, I'm using 0w30

To my understanding both have the 30 so the warm thickness will be the same but cold engine 0w30 will be thinner and flow better at startup.

Am I missing something or is 0w30 just the best for any weather as it provides the best protection in any weather startup...??

I've used 0w30 for the last few years and thought I'd ask... I barely ever tow in this one.
Click to expand...

You're fine. Both are classified as a 30 weight at 100C, and so should provide similar oil pressure at operating temp with the 0W30 being easier on the engine during startup.

Sent from my XT1585 using Tapatalk
 
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SLmateo

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Thanks, I originally asked because it seems like 10w should just be obsolete with what I knew (synthetic). and it seems it pretty much is except in track conditions.

-better/thinner viscosity even at 75° = better lubrication

-faster dissipation of heat = better mpg

To my knowledge and research... and side note higher weight isn't always good as higher oil pressure doesn't mean more flow. Higher viscosity, higher pressure, less flow.
 
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michael hurd

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Bobistheoilguy dot com.

Both 0w30 and 10w30 exhibit the same viscosity at 100C, 0w30 has a lower pour point than 10w30.

SLmateo, you have it right... higher oil pressure does not mean more flow.
 
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