What weight motor oil do you guys use?

Information on the naturally-aspirated KA24E and KA24DE engines.
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S13_RB25
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Before some people hate on me for not searching and what not. I did and most of those links were dead! So I got a freshly rebuilt ka24de! For the break in period im using a autozone 10w30 motor oil! But what should run afterwards? What weight and brand? In summer it usually gets around 100° or so and -10° easily in the winter. So what are your guys thoughts, pointers, suggestions and what not?


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asoomal
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210 XXX Miles.

Stock KA24DE, 165-175 Compression

Castrol 5W50 Syntec (Not really a synthetic)

Car loves it.

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neverlift
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I have about 10k on this block
boosted ka unsure of compression(vac sits at 20~21 idle)

super tech 20w50, probably go to 10w40 in the winter.

I run on the heavy side, but my oil sees more work than an na ka.

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S13_RB25
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So im guessing 10w40 for the summer and drop it down to 10w30 for the winter??

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Razi
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I've ran 10w-30 the whole time I've owned this car, but I might bump it up to 10w-40 next oil change, just to see how I like it.

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neverlift
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I like the heavy stuff, keep oil pressure higher when you are really beating it.

2FoetySx
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i thought that increasing your oil viscosity could raise the oil pressure and potentially cause gasket failure?

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-RJ-
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I run 5w30 all year in all my KA cars. (Frontier, S13, Altima) Haven't had any problems. Temps in summer were up to 100 and winter was below 20

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JacSmyth
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Car: 1991 Nissan 240SX - 1995 KA24DE - 5 Speed
1981 VW Rabbit Pick-Up - 1.6 Diesel - 5 speed
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asoomal wrote:210 XXX Miles.

Stock KA24DE, 165-175 Compression

Castrol 5W50 Syntec (Not really a synthetic)

Car loves it.
What exactly is the advantage of a synthetic over the conventional oil. I know that synthetic oil is less gritty so its smoother for engines that have more miles on the engine. What exactly outside of the posibility of longer engine life is there in using synthetic oil?

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asoomal
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Extended drain intervals.

You can get different weights (you can't find conventional in 5W50 or 10W60, etc)
Apparently they increase mileage and don't break down as fast. The only reason why I went for "synthetic" was because of the viscosity. The KA loves the heavy stuff, but I also didn't want to run too thick of an oil at start up (15W40)

That is why I went with the 5W50 Syntec. I also hear that the Shell Rotella 5W40 is good stuff too, not the diesel stuff, but the gasoline stuff as there are way to many detergents in the diesel oil.

ztunelover
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Car: 1995 Nissan 240sx

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I used to use 5w30 mobil 1 or castrol syntec 5w30, then I found motul 8100 xclean 5w30 for the same price from a source and never looked back. I am considering 300v in 5w30 now that I am potentially going into autocrossing.

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D-UNIT
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Car: a 91' S13 (15.014 @ 94.56mph NA) KA-T

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I tried 20w50 once and I got horrible gas mileage. Like 50 miles less per tank and that was synthetic. I switched back and got 330 miles per tank instantly. Don't see the benefits.

Bigvinnie
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Because of the KA ring lands being thinner than most larger displacement engines I use a half and half mixture.

Castrol GTX 5W30 and 10W40.

5w30 for cold starting and lubricity, and the 10w40 to keep the compression high and high rev with thin ring lands.

Had up to 32MPG freeway with a few modifications.

No synthetic oil, just all castrol.

S-chassis life
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S14 Kouki S14 SR20

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Walmart oil cause its cheap for the 5 quart jug :) but i get Valvoline 10w30


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