20w/60 Selenia HPX - Alfa Romeo Forum
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20w/60 Selenia HPX

Any comments on the above oil - I believe its recommended by Fiat for high performance motors post 60000 miles and I know some high performance Fiat/Lancia/Alfa owning folk who swear by it but....

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Wave Re: 20w/60 Selenia HPX

I think that the viscosity when cold could be a problem, if you want a higher viscosity when hot you should be looking for a 10w/60 oil to aid circulation when cold and the increased hot viscosity should help to maintain a better oil pressure
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Re: 20w/60 Selenia HPX

I'm sure Selenia do a 10/50W or 10/60W
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Re: 20w/60 Selenia HPX

I've found it:
Selenia Racing 10/60W
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Re: 20w/60 Selenia HPX

They also do a "Selenia 20k For Alfa Romeo" which is 10W/40 Semi-synthetic....

I was just wondering about the HPX stuff because I've been recommended it and on further investigation discovered it is actually designed by Fiat for their high performance motors in later life.....
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Re: 20w/60 Selenia HPX

I have been told that for an older mileage engine you want a 10/40w or a 15/40w oil, anything too thick and you stand the chance of blowing your aged oil seals.

ps I use Valvoline MaxLife 10/40w
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Re: 20w/60 Selenia HPX

I would caution the use of 20w oil as its really too thick on cold starts, use 10w-40, 10w-50 or 10w-60 as recommended.

Alfa also recommend 5w-30 or 5w-40 for driving in -20 degC which is not relevant to the UK climate but indicates the need for lower "W" viscosities for cold start protection in colder climates.

The use of oils that are too thin or thick can have detremental effects on your engine which is explained here:

Surely the thicker the oil the better!

This isn't always true - even when using a petroleum oil. Although it is true that heavier viscosity oils (which are generally thought of as being thicker) will hold up better under heavy loads and high temperatures, this doesn't necessarily make them a better choice for all applications.

On many newer vehicles only 0w-40, 5w40 or 10w40 engine oils are recommended by the manufacturer. If you choose to use a higher viscosity oil than what is recommended, at the very least you are likely to reduce performance of the engine. Fuel economy will likely go down and engine performance will drop.

In the winter months it is highly recommended that you not use a heavier grade oil than what is recommended by the manufacturer. In cold start conditions you could very well be causing more engine wear than when using a lighter viscosity oil. In the summer months, going to a heavier grade is less of an issue, but there are still some things to be aware of.

Moving one grade up from the recommended viscosity is not likely to cause any problems (say from a 10w40 to a 10w50 oil). The differences in pumping and flow resitance will be slight. Although, efficiency of the engine will decrease, the oil will likely still flow adequately through the engine to maintain proper protection. However, it will not likely protect any better than the lighter weight oil recommended by the manufacturer.

Moving two grades up from the recommended viscosity (say 10w40 to 10w-60) is a little more extreme and could cause long term engine damage if not short term. Although the oil will still probably flow ok through the engine, it is a heavier visocosity oil. As such it will be more difficult to pump the oil through the engine. More friction will be present than with a lighter viscosity oil. More friction will be present than with a lighter viscosity oil. More friction means more heat. In other words, by going to a thicker oil in the summer months, you may actually be causing more heat build-up within the engine. You'll still be providing adequate protection from metal to metal contact in the engine by going with a high viscosity, but the higher viscosity will raise engine temperatures.

In the short run, this is no big deal. However, over the long term, when engine components are run at higher temperatures, they WILL wear out more quickly. As such, if you intend on keeping the vehicle for awhile, keep this in mind if you're considering using a heavier weight oil than the manufacturer recommends.

The best advice is to is to stay away from viscosity grades that are not mentioned in your owner's manual.

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Re: 20w/60 Selenia HPX

Hi there.. I have an Alfa 145 QV 114kw... And i got an engine rebuilt which costed around 2700euros.. And i got this oil in it now.. Selenia HPX.. Now some people said to me that this is only for old "crushed" engines with 300k km... First Oil after rebuilt in it was Selenia Racing, but on the interval of 10.000km i had to refill around 3,5L of S Racing in it But ok.. It was completely new and needed to be "runned in" again.. Now i went with HPX situation is much better.. around 0,5L in 6500km... It is better from this site of story.. But now i would ask you something else... Could this oil damage my QV in anyway or were those story in concept someone said to me...

I like my car very much and i will probably never sold it beacuse there aren't much QV's like mine in this part of the europe(there are just 2 in my country in this color or so it's said ).. But still i would not like give another 2600 eur for reparing the engine...

Only problem that i noticed and i couldnt figured it out was why car didn't start immediatly now when was 0-3 degrees last weeks.. But I got answer here.. Oil pressure drops too much and then sounds like bad compression when igniting the engine

But now it is warm already and the car starts normally... So can this oil mean trouble

tnx for answers...

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Re: 20w/60 Selenia HPX

Oil on the cheap.....
In NZ we generally get american formulation oils, though sometimes we are blessed with AGIP oil on occasion.

For my 164, a solution has been to use 20W-40, which is a very inexpensive oil. Pressure is good when on startup, and then as it warms up (which takes about 5mins), resuure drops, but rises with revs seamlessly.

The 155 does the same - admittedly its runng 15W-40, and sometimes 15W-30, but I have never had occasion to use 10W-40 and 5W-60 which Shell says is for Ferraris....and as closely retaed as they are to Alfas, they are not everyday cars for everyday oils.

Nevertheless...even old oil seals appear to cope with a fair amount of pressure, but thermal flow is perhaps as important. All my mates in the AROCnz alwayswait till the engine is 'toasty', and then you can do what you like rev-wise.

Another interesting product to consider is the oil product we get here and doubtless get in Europe called 'Pro-Long'

I don;t work for them , but the damn stuff works. Its basically Centrifuge grease in alcohol solution. ultra-long chain ol moelcules ahdere to explosed surfaces, and bind themselves to hose surfaces, reducing the friction coefficient - its so good that it quiets noisy tappets.
Another thing it does (fortunately or unfortunately) is increases the time needed to warm oil, and reduces engine temp from fricative forces.....thus allowing a longer priod of oil use, as well as thicker oils.

Thick oils in Old Alfas seem ok - a good number if dudes in Wellington with now aging 75's etc are using oils as thick as 30W-70 in their older Alfas to keep the oil from being squeezed out of lubrication galleries at speed....

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Re: 20w/60 Selenia HPX

My old bus has >190k miles (300k kms) and it runs best on 15W40.

I don't have any wear on the cams at all and the bores seem okay (no "step" at the top and no glazing) so the "40" weight seems to be more than up to the job.

I do notice I lose oil - more in summer (maybe a litre every 3000 miles..) but a lot of this must be leakage. There is a weep from around the sump and from other places. The beast doesn't "drip" though.

"10" seems to leak more (and I daresay burn more) than "15" which is why I use 15W40 in summer and 10W40 in winter.

Regular old Selenia 20k or boring old mineral (white bottle) Castol GTX 15W40 flavour (not the Magnetic stuff) changed at the recommended interval (12,000m) has kept the beast going up until now..

I think we can over-obsess over oil.

Ralf S.

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