m54daboll Posted March 24, 2015 Report Share Posted March 24, 2015 hey everyone. Doing a project for my statistics class and need some data. Of course I have to make it related to z's haha. Just wondering what brand gasoline and motor oil you use. For motor oil, it doesn't matter about viscosity, just the brand. I use: Gas: Chevon 91 Octane Motor Oil: Mobil 1 Full Synthetic Quote Link to comment
MicroMachinery Posted March 24, 2015 Report Share Posted March 24, 2015 Gas: Chevron Oil: Chevron Quote Link to comment
Guest Rick-rat Posted March 24, 2015 Report Share Posted March 24, 2015 gas: whatever is available Oil : Shell Rotella Quote Link to comment
Fat510 Posted March 24, 2015 Report Share Posted March 24, 2015 Oil: valvoline Gas: cheapest in town Quote Link to comment
DanielC Posted March 24, 2015 Report Share Posted March 24, 2015 Be careful, old engines need old oils. Specifically, anti wear ingredients like phosphorus, and zinc compounds. The compound is abbreviated ZDDP. On high milage engines, that burn a little oil, these compounds can poison a catalytic converter, so the level of then was reduced in modern oils. Engine manufacturers changed engine designs to not require oils with anti wear ingredients. So, modern engines, modern oils. Older engine, you need the higher level of ZDDP. My oil of choice is Valvoline VR-1 racing oil. I do not know enough about the ignition timing controls on a 280 ZX to recommend a gasoline choice. See what the owners manual says, if you have one. Quote Link to comment
Slowpoke Posted March 24, 2015 Report Share Posted March 24, 2015 Gas: Shell or BP Oil: Castrol, switching to Valvoilne VR-1 this summer Quote Link to comment
datzenmike Posted March 25, 2015 Report Share Posted March 25, 2015 Be careful, old engines need old oils. Specifically, anti wear ingredients like phosphorus, and zinc compounds. The compound is abbreviated ZDDP. On high milage engines, that burn a little oil, these compounds can poison a catalytic converter, so the level of then was reduced in modern oils. Engine manufacturers changed engine designs to not require oils with anti wear ingredients. Gas: Chevron Oil: Chevron gas: whatever is available Oil : Shell Rotella Chevron Delo 400 or Shell Rotella T are 'light' diesel oils which still have a reasonable amount of ZDDP in them. I run Delo 400 15-40 but if it wasn't available then the Shell. Your zx is the same L series of engine as used in the '68 510. If you run a synthetic oil that's fine but they tend to leak past old gaskets and worn seals where ordinary dinosaur oils do not. Gas is gas the L20B doesn't care. Quote Link to comment
ggzilla Posted March 25, 2015 Report Share Posted March 25, 2015 He's asking about Z-cars. Still, L20B is relevant by equivalency. My old Datsun engines run great on new oil. No smoke after 100,000 miles. No special zddp oil. Quote Link to comment
datzenmike Posted March 25, 2015 Report Share Posted March 25, 2015 Oil companies say that the original ZDDP level was far above what was needed back then and that the newer formulation, now close to half as much... should still work and give the needed scuff protection. Well, as much as I totally believe them, it's my car and I'm not taking the chance. Quote Link to comment
Phantom Posted April 26, 2015 Report Share Posted April 26, 2015 Same as m54daboli. Then again, the LS1 in my car requires 91 Octane with a 10.5 CR vs the stock L28 at around 8.5 which can run fine on 87 Octane all day long. Oil is Mobil 1 synthetic. Been running it in the car since I put the LS1 in in 2003. Prior to that it was Castrol 10W-40 in the L28. Quote Link to comment
83turbo280zx Posted June 8, 2015 Report Share Posted June 8, 2015 I run 93 octane (Texas) oil I usually run Castrol 10w-40 with 1 quart of Rislone ZDDP additive. As stated above, none of the newer shelf oils (aside from Valvoline VR1, Amsoil, and some Royal Purples) have the proper ZDDP amount in them for flat tappet valve trains anymore. Everyone is running roller valve train which doesn't require as much ZDDP. -83 Turbo 280zx L28 Quote Link to comment
Z Speed Posted June 12, 2015 Report Share Posted June 12, 2015 Been running AMS OIL since pretty much the first oil change in1972.... Quote Link to comment
kneesamo Posted September 27, 2015 Report Share Posted September 27, 2015 Gas: 91 octance Oil: Delo 400 Stock 1973 240Z Quote Link to comment
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