re: Is synthetic oil a waste?

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Good for them. They're wrong.

Crankcase oil loads up with combustion by-products and absolutely should be changed regularly.

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I think he meant ASE certified people aren't the ones doing the oil changing, the shop guys do that.



Also, I change my oil every 7,000 miles. my truck says 6,500 on Dino oil. I also found that the Toyota filters are a higher quality than most other store bought filters. So I bought ten of them on eBay.

I figure it costs me $30 every five months or so to change my oil. I usually lube my fittings, and detail my frame and undercarriage too.
I keep my cars dirty, but under the hood is always clean. First sign of an oil leak and I'm pulling the engine and replacing every seal and gasket.

When I buy a used vehicle pulling the engine is one of the first things I do.

(except for my current truck; it's been perfect *knock on wood* so far {only issue I had MeauJeaux2 helped me through}

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My friend is a renowned expert hydraulic engineer and doesn't discount synthetic properties but does agree it's a waste for use on your car engines.

Eta he also definitely suggests changing oil but 3k is unnecessary as most know now.

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Those two statements contradict each other. If synthetic lasts longer, than that alone IMO is a reason to use it over Dino oil.

A jug of good Synthetic is like $27 a jug of good regular oil is like $14. I don't mind the difference. The filter is where you don't want to skimp.
Frams suck arse and most are worse than that.

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f synthetic lasts longer

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It doesn't in the crankcase. Combustion blowby loads it up at the same rate that conventional gets loaded up. Regular oil is more than adequate in most applications as it will still be in very good shape chemically when it gets loaded with carbon and starts to loose lubricity.

Sealed transmissions are great. Nobody changes the fluid anyway until a bazillion miles.

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Frams suck arse and most are worse than that.

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This is a thread unto itself. It is more hotly debated than oil. One thing I noticed is the people that actually cut filters apart to see how they are constructed always come down on the side of Napoleon. While the more expensive Fram filters are pretty good they are over priced. After taking several of the cheap Fram filters apart I would just as soon put an empty can on in place of a filter instead of a Fram oil filter.

FIFW I prefer Purolator filters.

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Wtodd

I've been using Amsoil for about 8 yrs; I change my oil ONCE a year and filter every 7,500 miles AND I get a better product. When I was considering changing from regular to synthetic I did a lot of research and finally had it explained to me that made sense. Molecules in regular oil are like a handful of change; quarters, dimes, pennies, etc. Synthetic oil is perfect so every molecule is like a dime or a quarter or penny, etc. Make sense?

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Boo yah !

Nissan Altima with 150k


Mobile one synthetic. Change once every 7,500 and runs like a champ

3k argument is nonsense

This is a thread unto itself. It is more hotly debated than oil. One thing I noticed is the people that actually cut filters apart to see how they are constructed always come down on the side of Napoleon. While the more expensive Fram filters are pretty good they are over priced. After taking several of the cheap Fram filters apart I would just as soon put an empty can on in place of a filter instead of a Fram oil filter.

FIFW I prefer Purolator filters.


Redbone, have you ever posted on TTORA.com? It's a Toyota site. I have read some very interesting articles on this subject there.

The Purolater filters excelled in every phase.

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It's subjected to the same conditions such as blowby (to a lesser extent than diesel engines) and general crap loading from dust, condensation, etc.

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Except you completely disregard the fact that synthetic motor oils handle the byproducts that are produced in blow-by gasses better than conventional motor oils. Not even debatable. Synthetic oils generally start with higher TBN's and maintain a higher TBN which is the major factor in why they can be used to extend OCI's. Synthetic oil in the crankcase absolutely makes a difference which is why it is increasingly becoming the factory fill. Ford Motorcraft oils are either semi-synthetic or full synthetic. European OEM oils are universally synthetic to handle long OCI's. Transmission, axle, power-steering fluids these days are mostly synthetic from the OEM.

Mine is a dummy monitor, it comes on every 6,500 miles.