what oil?

[sspstang]

How about 200k on a 1991 Miata running 5lbs of boost on a supercharger. Mostly Rotella t synthetic

Honestly it doesn't really matter what you use as long as you change on something that resembles a schedule and have good filtration both oil and air.


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I agree with this post.

[Blackpony]

haha, I just now noticed that I saw you a few days ago in Denton where 380 & 288 intersect...I noticed the 10th anni rims and stared

Yes i would run the 5-30 in the higher mileage engines. Also run a motorcraft filter. I run motorcraft oil and filter in all my vehicles. Always comes out clean.

[TENGRAM]

I agree with this post.

x2... as long as you stick close to the recommended oil weight.


OP, with only 111k miles I would stay with the 5w20 if that is what is recommended by the manufacturer for yours. Synthetic will allow you to go to longer change intervals and does have the benefit of lower viscosity at startup, but as for increasing longevity... everybody I know wrecks their shit, trades or sells it, or swaps engines long before that would make a difference.

[The King]

Yes i would run the 5-30 in the higher mileage engines. Also run a motorcraft filter. I run motorcraft oil and filter in all my vehicles. Always comes out clean.

Agreed, I always use Motorcraft filters.

[Z06killinsbf]

Beware, changing to full synthetic can possibly lead to leaks/drips do to the way the gaskets have established a set with the conventional oil. Older motors are more prone to this. Just stick with what you're using.

[The King]

True, I changed over to using synthetic relatively early in my vehicles lives.

[sspstang]

One other thing to point out. Motorcraft oil is a synblend.

[Downs]

One other thing to point out. Motorcraft oil is a synblend.

They make a full syn also.


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[sspstang]

They make a full syn also.


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I have seen that, I wonder how good it is? I have only ran the synblend, but I am more then sold on this oil.

[mschmoyer]

O'reilly's or Autozone blend for me. Advanced Auto if I'm in the area when I'm doing my change about every 15k or so. What's synthetic?

Joking aside...can anybody really point to a brand of oil that actually hurt a motor? My conspiracy theory mind goes back to thinking of the brands just like HEB or Walmart brand "cola" really being the real thing minus the marketing and brand.

My $4000 220,000k F150 gets the $50 valvoline special @ shop and my C5Z gets self-changed mobile1 + WIX filter. Both run great.

[sspstang]

My coupe gets mobil 1 and a motorcraft filter.

[Blakeski]

I use Royal Purple only, been using it for 4 years now, and the only thing I would even consider is Mobil 1, I used that before RP.

[Downs]

O'reilly's or Autozone blend for me. Advanced Auto if I'm in the area when I'm doing my change about every 15k or so. What's synthetic?

Joking aside...can anybody really point to a brand of oil that actually hurt a motor? My conspiracy theory mind goes back to thinking of the brands just like HEB or Walmart brand "cola" really being the real thing minus the marketing and brand.

My $4000 220,000k F150 gets the $50 valvoline special @ shop and my C5Z gets self-changed mobile1 + WIX filter. Both run great.

Usually true. The Wal Mart brand Supertech oil which they came out with a synthetic of is bottled by a place called Warren Petroleum I think, which IIRC also does other labels though I don't remember which right now.

[Stephen]

my old chebby truck has 370k on junk oil snake/super-tech etc and is the original motor.. hell its still running r-12 with no leaks haha... just changed the oil on time! when it gets dark or low geuss the fuck what? change that shit.. it does kick out a small cloud of smoke upon start up (fucking throttlebody valve seals lol

redline seems to be the way to go right now

I use valvoline high mileage in mine and my wifes car.. we dont drive hard though

[SMEGMA STENCH]

Honestly it doesn't really matter what you use as long as you change on something that resembles a schedule...

Others agreed, I disagree. Sorry but there's a big difference between Wal-Mart's Supertech brand and something like AMSoil, when it comes to how well it will protect your engine in the long run. How it will contribute to engine life. Also your blanket statement would seem to suggest that there really isn't much difference in the chemical makeup of all the various oils, and that it wouldn't make much difference anyway.