is it worth it to spend the extra money on that stuff? it worked wonders on my tranny, but i dont know if i should use it on my engine. any experiences helpfull.

Z haiku:

i love you, my Z

i dont want to say goodbye

but you smell like gas

I use Amsoil synthetic in all my cars, including the Z. If for nothing else because it doesn't break down in extreme conditions or in vehicles being stored or that spend a lot of time sitting in the garage. That means parts down wear out as fast. It can also lower emissions, ingrease gas mileage, help with cold starting, etc.

For the engine I use Kendall for the break in then change to synth. I think synthetic oil in the engine, trans, and diff. is a good idea. Also, synthetic grease on the wheel bearings. Any of the big brands would be good- Amsoil, Readline, Mobil1, and Royal Purple.

Have fun!

Just thought I would add one thought. Synthetic is only worth the money if your engine is in good mechanical shape when you put it in. If you are looking for a miracle cure to a tired engine, save your money and get it rebuilt, then use the synthetic. There's no sense in spending $6.95 a quart or more if your engine isn't in good shape to begin with. I've had people ask me if they should use it in an engine that had 75,000 mile on it to make it last longer, it won't.

As a side note to your other posting, a good quality motor oil has detergents in it that will do as much to clean your engine as any cleaner. If your engine has some miles on it a combustion chamber cleaner will do more good than anything you can put in the crankcase.

I had an old 200sx I bought years ago that had 160,000 miles on it. The original owner maintained it religiously and so did I. He used Castrol GTX 20w-50 in it from the first oil change, when I sold the car it had over 240,000 miles on it and had never had anything more than the valve cover off it. It pays to maintain a vehicle.

My buddy had told me from dyno testing, the use of red-line oil over convetional oil was good for another 5 horsepower at high rpm. Sorry, can't quote the article.

Thanks 2manyZ's for picking me up on the worn engine tip. It is true that if you have an engine that burns or leaks oil with regular oil that synthetic will not resolve this. And then you are leaking/burning expensive oil!

I wouldn't doubt byunique's comments about the dyno test either! I am sure it could be good for a few percentage points in the HP department.

Have fun!

No problem Royce. Probably when I read one of your posts a thought pops up to add just like when you read one of mine! Between the two of us we would make a pretty darn smart guy!

BTW, Castrol Syntec is pretty good stuff too, I ran that in my race car since I couldn't afford the really expensive stuff.

ont the syntec though the reason they call it syntec is that its not really synthetic oil. your still using dino oil that has been purified. thats what the big deal was with castrol and mobil and such about the syntec a while back

Well, to be technical I didn't say the Syntec was synthetic, I just said it was good "stuff". And it is a bit cheaper. I've been using Castrol in all my vehicles except for the diesel for years and have never had any problems with "sludge" build-up like some of the oils I used in the past. I couldn't see spending so much on the full synthetic when the Syntec did the job for less. I never have used any full synthetics in my engines but I have used the Red Line synthetic transmission and rear end lubes. Not that it made my 280 fast enough to keep up with all the 240's, 325's, and RX-7's!