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How often to change fully synthetic engine oil?

23K views 155 replies 32 participants last post by  securityguy1  
#1 ·
I bought my 2013 Silverado 2500 gasser this passed summer & one of the first things I did was get the oil changed with mobile1 full synthetic. It's been about 4,700 miles since then now. At what interval should I change the engine oil with it being fully synthetic? I know that the oil filter is a limiting factor... What's a good oil filter to use?? I'm going to start doing the oil changes myself. Thanks!
 
#152 ·
You can change the oil yourself and not void your warranty. Keep the receipts, take a couple of pics (oil draining, odometer, OLM info, etc.) and keep a file just in case you ever have to prove it was done on schedule. But that necessity is very remote.
 
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#136 ·
Cars became part of the so called " Recyclebles". You're right. It's very hard to find someone driving a car with high miles. With the Leasing system, every 3 years they get a new vehicle, so manufactures don't care so much anymore. I'm having hard time , because I buy and keep it till die, and since it now it dies prematurely, not smart to do it.
 
#134 ·
Well, in fairness, part of the reason that they aren't lasting as long is also due to extended factory service intervals.

A lot of it is directly related to emissions and efficiency requirements.

But yeah, they don't last as long nor are they as tolerant as they once were. I tell non-car folk they are less likely to "break down" these days, but much more likely to have a new car every 5 years.

I agree with all the nonsense tech. Android auto is as far as I go ;)
 
#132 ·
The so call " New Technology " became so confusing. And instead of making engines that last longer, it's the opposite. Even diesel motors, does not last as the ones built prior to the year 2000. I'm wrong? The up keep is so expensive. All this electronic shit, now comes the kill switch. I remember have to drive carefully, other wise my father would activated the kill switch, taking my keys way. Now? The big papa goverment , will do it without taking the keys way! But it's all for our safety, nothing to see here.
 
#131 ·
The down side is sulfur particles are 1 micron, and the Amsoil Bypass filters at 20 microns and 2 microns. I'm sure they could have made the finer filter a 1 micron filter, but I guess there is enough sulfur to clog up the 2 micron filter and it would end up not filtering anything.

Amsoil claims the 20 micron free flow gets 75% of the oil each pass through the filters and the 2 micron filter gets 25%. I've talked to a couple of engineers that work for other oil companies who told me that the 2 micron filter isn't getting 25% of the oil during each revolution. They both claimed it was more like 18%~19%.

I don't remember how many times Amsoil claims the oil passes through the full flow filter every hour at 1500 RPMs, but it doesn't really matter to me. The 2 micron filter is catching small particles of debris that cause micro wear on the engine.

Sometimes I'll geek out and watch a YouTube presentation from some of the more scientific types regarding our truck engines. They have some interesting theories about what the "dirty" oil contaminants do to an engine and where they do it. It always occurs to me that regardless of what their analysis reveal, all I can do is keep the oil as clean as I can reasonably (unreasonably to many) do. It lets me sleep a little better at night.
 
#127 ·
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#135 ·
Meanwhile, over at BITOG, this is what they have to say about rat 540.

Here are a few choice quotes:

"Highly suspect. I don't pay attention to this guy."

"Zero credibility. That blog is a laughing stock."

"No. There is no credibility. In fact, like political topics, the rat 540 blog has become a flashpoint for bad behavior on the site because his results are in fact, so ridiculous."
Yup. Anyone who references rat540 or project farm automatically has their argument null and voided.