Have you upgraded your fuel injectors?

[Tiger]

BTW... the injectors you installed... were they cleaned or used?

[Tiger]

Yes, the Bosch fuel injectors were used in Ford cars... particularly Ford Mustang but lots of their cars and SUV used the same injectors.

I bought a set of injectors... cleaned and flowed... and picked so all 8 injectors are within 1% tolerance of each other. This would really smooth out the engine. Stock tolerace level is 3 to 5%... which means if you got two that is supposed to give you 19 lb of fuels per hour... one will be short by 1 lb of fuel... that's huge!

It doesn't matter if you got euro or not... it is based on engine size and amount of fuel needed to satisfy the demand. My stock injectors are 0280150778... so you can compare with yours... should be same injectors.

[bubba966]

My car is still stock ECU.

Get some conforti or EAT software. E3 sparkplugs. Red Line or equivalent in the diff. Amsoil 0w30 or equivalent in the engine. Square PS2's all around.

All that with your new injectors & gaskets will give you pretty impressive mileage. Should be better than most M50TU 525's...

[Tiger]

I am going to put in Amsoil 75w140 differential fluid.

Just changed the oil to Mobil 1 0w20. I can hear and feel the difference just by starting the car up.

Already got great tires.

I may bite on the EAT in future... just want to see what I can do in stock ECU form.

[bubba966]

I am going to put in Amsoil 75w140 differential fluid.

Just changed the oil to Mobil 1 0w20. I can hear and feel the difference just by starting the car up.

Already got great tires.

I may bite on the EAT in future... just want to see what I can do in stock ECU form.

75w140 is too heavy for the diff, go with the 75w90. I've got the Amsoil severe gear 75w90 sitting around waiting to go into my diff, but it had redline 75w90 installed not too long before I bought it and doesn't need changing yet.

My car had mobil 1 in it when I bought it, and I'd not put it back in personally. Would rather put dino juice in than mobil 1. Have delo synth in it now, but will go back to the amsoil 0w30 on the next change. The delo is fine, but not quite up to the same level as the amsoil.

[Tiger]

Doesn't our limited slip requires 75W140? That is why I bought it. I also have 75W90 for my other cars. Mine is also severe gear too.

I only use Mobil 1 because it is readily available and cheaper when on sale. Gan't really get the cost down on the Amsoil. Try the 0W20... it is all we need. I am using it on my BMW before I deploy it on all my cars. My SUV uses 5W20 and the car ran great since new...

I read Bob the Oil Guy... and he recommends 0W20 synthetic oils for everyone.

[bubba966]

You put a limited slip diff in your car? Shouldn't matter LS or not. An LS diff requires certain properties to prevent clutch chatter in the LS unit. Most oils need an LS friction modifier added, but the Amsoil severe gear oil doesn't need any additives for a LS diff. Looked up the requirements for a '93 M5 which does have a factory LS and it specs the same 75w90 a non-LS diff would use. I suppose you could put the 75w140 in there, but it'd hurt your mileage.

I might try the Amsoil 0w20 at some point, but I'm not putting Mobil 1 in there.

[Tiger]

My car is a 1994... it doesn't have traction control so factory install limited slip. Yours is 1995 and probably does have traction control so factory install open differential.

Yeah, I looked it up... Amsoil say 75w140 for limited slip... then I looked at the spec for 75w90 and it said to be compatible with most limited slip... seems like all synthetic one are compatible with limited slip... I am going to put in 75w90 in... if it chatters, I'll just add their modifier. Thanks for the tip!

[bubba966]

Only US spec E34 with LSD as standard than I'm recalling was the M5. Yeah, I've got ASC+T & an open diff. But ASC+T was an option and non-ASC+T cars still had open diffs. You have the build sheet or seen the markings on the diff telling you it's a LSD? Maybe is, maybe isn't...

Not sure why Amsoil would quote a 540 w/LSD needing 75w140 and say the M5 needs 75w90 when the diffs are the same except for the gear ratios.

[Tiger]

I did see S stamping on the differential... I do recall see my car spec sheet with LSD. It is a real bear to turn the car in parking lot... seriously. It is like a 35' turning radius when backing out.