Jalpa oil type / weight?

THECARREAPER · #1 (**permalink**) 04-17-2008, 03:55 PM

MY new to me Jalpa was at a dealer for the PPI, and they scolded the ( former) owner a bit for using Castrol 20-50 in the car.

they swear by synthetic 15-40 and changed the oil while it was in their care.

i do not have a Jalpa owners manual, and this weight seems a bit thin to me.

i do agree a more modern thinner oil may provide more cold start protection as 20-50 is so thick!

What brand and weight of oil are the rest of you running in you older carb Lamborghini's ?

thanks!

raymond · #2 (**permalink**) 04-18-2008, 01:03 AM

Owner Manual says 10W50, I used Motorex 10W50 and Mobil 1 15W50 both with good results, also an option is Sunoco 10W40.
I wouldn't go below 10 cold and 40 hot viscosity.

BTW the manuals are on Lamborghini Jalpa Home Page

THECARREAPER · #3 (**permalink**) 04-18-2008, 04:34 AM

Many thanks to you Raymond, that was exactly what i was looking for!

ottocilindri · #4 (**permalink**) 06-01-2008, 11:52 AM

.
Multi viscosity oils are oils that have polymers added to them. These polymers are what prevent the oil from thinning as it comes up to operating temperature.

At cold temperatures the polymers are coiled up allowing the oil to flow at the viscosity indicated by the lower number (i.e. 5W-XX, 10W-XX, 20W-XX).

As the oil warms, the polymers begin to unwind into long chains which prevents the oil from thinning. At an operating temperature of 100 C the oil will have thinned only as much as the higher viscosity number indicates (i.e. xW-30, xW-40, xW-50).

I would agree with the person who posted above and not go below 10W for start-up and 40 at-operating. Castrol 20W-50 and Mobil1 15W-50 are excellent oils superior in every way to the petroleum oils that most of the world still puts in their cars (higher film strength, base stability, oxidation resistance, flow characteristics, etc.)

Bottom line is that I would not sweat using the Mobil1 or Castrol at all in your car (this is esp true if you live in a colder climate). Just follow the ole adage of not beating on the car via the accelerator pedal until it's up to temp.

emilio · #5 (**permalink**) 06-01-2008, 12:35 PM

Raymond

on 1983-84 Autocapital magazine in Italy had a test of a jalpa

i think was a silver car

THECARREAPER · #6 (**permalink**) 06-01-2008, 04:06 PM

Quote:

Originally Posted by ottocilindri

.
Multi viscosity oils are oils that have polymers added to them. These polymers are what prevent the oil from thinning as it comes up to operating temperature.

At cold temperatures the polymers are coiled up allowing the oil to flow at the viscosity indicated by the lower number (i.e. 5W-XX, 10W-XX, 20W-XX).

As the oil warms, the polymers begin to unwind into long chains which prevents the oil from thinning. At an operating temperature of 100 C the oil will have thinned only as much as the higher viscosity number indicates (i.e. xW-30, xW-40, xW-50).

I would agree with the person who posted above and not go below 10W for start-up and 40 at-operating. Castrol 20W-50 and Mobil1 15W-50 are excellent oils superior in every way to the petroleum oils that most of the world still puts in their cars (higher film strength, base stability, oxidation resistance, flow characteristics, etc.)

Bottom line is that I would not sweat using the Mobil1 or Castrol at all in your car (this is esp true if you live in a colder climate). Just follow the ole adage of not beating on the car via the accelerator pedal until it's up to temp.

great advice, thank you.

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