See U Later 4

Hey Guys what is the best oil to use for a true Lt4 383 stroker Afr heads 10:8 to 1 compression on a 1995 T/a

BOOSTED AFR

You will get a thousand different opinions but I love Mobil 1 with a NAPA, Wix, or Mobil 1 filter.

Evil Opti

Well if its a new motor build then use conventional oil to break in the rings for the first 1000 miles. After that most synthetics of any brand (M1, Castrol, RP, pennzoil) is fine.

BOOSTED AFR

True fact. I didn't even consider the possibility that the engine could've been new.

30696bird

iTrader: (4)

I can't say from experience, BUT I have never seen anything positive posted about RP.

I have used M1 and a K&N filter for 8 years on mine and it's still going strong.

Evil Opti

Not to change the topic but thats a nice blue 63 vette you got. Whats its run in a 1/4?

BOOSTED AFR

Well, embarrassingly enough it's only gone a 10.15 @ 133. The first year bugs in that car have been astonishing.

We broke a tranny, bottomed out the rear tires to the wheel tubs from too much downforce. Have put 3 cams in the motor along with 2 torque converters along the way to finding all the bugs.

We think we have it licked now. We got the lifter bores bushed and realigned, went back to the original camshaft, new valve springs, and had our original converter rebuilt. Ripped a 1.3x 60' and stood the car up pretty well, but then lost the fuel pump at the other end. We were hoping for a 9 on that run.

RedHotG8

iTrader: (1)

I run Valvoline/Penzoil/Castrol synthetic with a NAPA gold filter and never had an oil related problem. I won't use Royal Purple since they have made false claims about their oil.

Tbird232ci

iTrader: (4)

Rotella T6 is some good stuff too.

69LSXCHIC

Yea we run rotella T in all our engines

fex77k

iTrader: (2)

I just run some pensoil in the sig car since it gets changed every other weekend, alky really milks the oil. I ran Mobile 1 when the motor was on the street, not the best oil out there but definitely not the worst. I try to get a full synthetic if I go that route and generally steer clear of cheap blends. If I'm not hard on the motor then I just get a normal conventional oil.

93Euphoria

Mobile 1 is the best but I recently use Rotella T6. Good stuff. Im surprised more people dont talk about it like they do mobile 1 or royal purple.

FormulaJoe

iTrader: (5)

What I would do is join Bobistheoilguy.com and ask this question there. I'm going to guess that most (not all) of the oils being recommended on this thread are simply based on personal preference.
Go on BITOG and and give them all the information you can about how you drive, distances, weather, etc. and they will be able to steer you in the right direction for a specific oil.

nascarnate326

iTrader: (1)

Clean oil.

Ed Wright

iTrader: (1)

If RP is Royal Purple, I don't know who's posts you read. But many professional racers and engine builders swear by it, and use it in everything they own. I have seen a couple on this message board blame their engine failures on oil, but that is plain stupid. Some can't accept responsibility for their own inabilities. If you have a clue as to what you are doing, any oil will be OK. "M1" is fine also.

Anybody that pops an engine and blames the oil should just be ignored.

Quazz

iTrader: (1)

As you can see, lots of different opinions.

I run Valvoline VR1 20W50.

I've ran mobile 1 in engines before without issue. The German mad QuakerState oil is good, Rotella T is good too. I've also ran Amsoil in a bunch of cars, and never had any issue. I think that unlass you are running an older engine, the oil choice isn't as important as proper weight and a good filter. K&N makes great filters, WIX and Motorcraft are also good. Many are made by the same manufacturers. Never run a FRAM.

BALLSS

most any brand oil is good. what you should confirm is how your engine was built in terms of bearing clearances. If set up wider (many performance engines are) than a heavier weight oil like 10-40 or 20-50. You would need a build sheet for this info

Cominus

I use the motor-craft synthetic blend.

bufmatmuslepants

iTrader: (3)

Why is the compression so low?

See U Later 4

Thanks guys for the opinions and to the last guy who asked about why is my compression so low thats about where u would want this engine why do u think it should have a different compression?? 383 stroker afr heads eagle crank je pistons what should be the compression ??