Ferrari AGIP Sint 2000 10w50 replacement for catalyst cars

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M1 0W-40 should work fine. It's what goes in my '85 QV and seems a popular choice. Nothing wrong with 5W-50, of course. Any modern oil is better than what was going in it from the factory. The factory issued an update recommending 5W-40:
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jayg

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Thanks for that factory bulletin Robert. I’ll probably stick with the 15w50 it mentions at the bottom since I have fantastic oil pressure and it never drives in below 40f.

Beautiful 308 btw! Summertime in Alaska has me out every day in our short season.
 

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jayg

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Just an update, 15w50 M1 was on sale so I grabbed a bunch. This car never really sees high ambient temps but that exhaust temp gets the engine bay super toasty. I’ll be measuring burnoff but so far all looks good and oil pressure is where I want it.
 

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FCD

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Just an update, 15w50 M1 was on sale so I grabbed a bunch. This car never really sees high ambient temps but that exhaust temp gets the engine bay super toasty. I’ll be measuring burnoff but so far all looks good and oil pressure is where I want it.
Cool, M1 15W-50 should work flawlessly in it.
I wish it was available over here on the other side of the pond, it's a top notch oil.
 
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I usually ran Mobil 1 15w-50 in my 78 308 GTS, with a Baldwin filter. Later I had a 87 328 GTS and usually Mobil 1 0w-40.
Do be careful with the 15w-50 until the car is fully warmed up (oil temp 170-180F)...you can get excessive oil pressure if you rev it while cold.
I once tried Mobil 1 15w-50 in my 97 F355 spider and on cold start oil pressure was over at like the 2 o'clock position on the gauge at idle!
Dumped it and put in the 5w-40 spec Shell. Not sure what I was thinking ;)

Seriously though, you really don't need to run a 50w oil unless you are tracking the car...oil pressures will be fine.
 

jayg

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Seriously though, you really don't need to run a 50w oil unless you are tracking the car...oil pressures will be fine.

Yeah I just like to run close to the spec and this thing has really strong oil pressure all the time. It doesn’t get hammered until everything is hot. The gearbox prevents that anyway since it only likes getting thrashed once it warms up.

I also use the factory UFI filter because I have a bunch of them and they are about the same price as the Baldwins up here for me. Also knowing it has the correct stand pipe and drain back valve is nice.

Cruising it stays just under 85 psi with light load.
 

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Hello! Nice car! If I raced the car, I would put a 20W-50 into it ; usually 20W-50 have very goog NOACKS : no more than 10.
There are a few issues :
1. Larger spreads oils apart the -W- shear down faster. They also contain more VII, letting more deposits while burning. So I would avoid 0W- and 5W-40 oils.
2. The car burns some oil. Minerals burn cleaner ; synthetics let more deposits when they burn.
3. There are cats on the car, so I would prefer ACEA C3 or API SP engine oils.
4. It seems the car sees rather cold climate and is not raced : high-HTHS 30 weight or 40 weight should be enough.

For road use, I would stick to an API SP 10W-40.

If you really want a 50 weight, for reasons above, I would prefer a 20W-50.

I would avoid 20W-60 and larger spread 60 weights, because of VII loads and deposits.
 

jayg

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Hello! Nice car! If I raced the car, I would put a 20W-50 into it ; usually 20W-50 have very goog NOACKS : no more than 10.
There are a few issues :
1. Larger spreads oils apart the -W- shear down faster. They also contain more VII, letting more deposits while burning. So I would avoid 0W- and 5W-40 oils.
2. The car burns some oil. Minerals burn cleaner ; synthetics let more deposits when they burn.
3. There are cats on the car, so I would prefer ACEA C3 or API SP engine oils.
4. It seems the car sees rather cold climate and is not raced : high-HTHS 30 weight or 40 weight should be enough.

For road use, I would stick to an API SP 10W-40.

If you really want a 50 weight, for reasons above, I would prefer a 20W-50.

I would avoid 20W-60 and larger spread 60 weights, because of VII loads and deposits.

It’s not the *i* really want a 50 weight it’s that Ferrari engineers wanted a 50 weight. The motor consumes only a small amount of oil and is far less than the manuals quart per 800 miles limit. There are cats on the car (which Ferrari put on at the time) and they still factored that into their 50 weight recommendation. The car isn’t tracked except for the occasional autocross but it spends its few miles a year above 5k frequently.

The car *doesn’t* really see a cold climate. Yes, I live in Alaska but the car isn’t driven before May or after September. Always above 40f as I stated. No issue starting the car in a heated garage with a 15w50. There is no way I’m running a 30 weight oil in this motor.

I went with 15w50 M1 so it’s all good and it will get a UOA at the end of next year at roughly 1k miles.
 
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It’s not the *i* really want a 50 weight it’s that Ferrari engineers wanted a 50 weight.

It seems Ferrari actually recommends using Shell Helix Ultra 5W-40 ('all models'):

M1 0W-40 should work fine. It's what goes in my '85 QV and seems a popular choice.
..... Any modern oil is better than what was going in it from the factory.
The factory issued an update recommending 5W-40:

View attachment 102129
 
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That may make some sense in a hotter environment. However, if you're bound by
Ferrari's original recommendation, why not just run a 10W-50? They still do exist.
I wouldn't though. Remember viscosity means drag and drag means less power.
.
 

jayg

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.
That may make some sense in a hotter environment. However, if you're bound by
Ferrari's original recommendation, why not just run a 10W-50? They still do exist.
I wouldn't though. Remember viscosity means drag and drag means less power.
.
I’m not bound to the 10w50 but I do like the 50wt. M1 15W50 was on sale and available here so it’s all good. Again, the car isn’t driven in cold temperatures so even though it’s Alaska, the car is run hard. With ambient temps in the 70s, though it’s not hot, the oil temp does creep with hard driving and that is 90% of the miles this car gets in our short season.
 
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FCD

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5W-40 would probably be enough for that engine, those 10W-50 Conventional oils from the 70s sheared like there was no tomorrow and probably by 1500 miles the oil had already become a 40 grade.
But i think M1 15W-50 is a solid choice.
 

jayg

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5W-40 would probably be enough for that engine, those 10W-50 Conventional oils from the 70s sheared like there was no tomorrow and probably by 1500 miles the oil had already become a 40 grade.
But i think M1 15W-50 is a solid choice.
This car has never had anything but synthetic. AGIP “sint” is synthetic.
 
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