I have a 1998 jaguar xj8 and the previous owner put 5w30 but i think that's too thin considering it has 102k miles and its a v8. What do you guys think? I used mobil super 5000 10w30 by the way and temps range from 40 to 70f at the moment but summer is right around the corner.
10w30 or 5w30 1998 Jaguar XJ8
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That makes no sense. You want the most free-flowing oil at startup. The most wear occurs on startup, so you want the least viscous oil available. 5w-30 should be put in the car.
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10w30 is just fine in your car. That's what I would use
Since you live in IL, I would use Maxlife 5W30 and its only around $17 for a 5 quart jug from Walmart. I use Maxlife in my 1990 Jaguar V12 and the engine seems to love it...
Originally Posted By: boostedtsiawd
In the manual it says 5w30 is recommended for maximum fuel economy. The pour point for 5w and 10w are both the same -36. They both flow the same it seems to me.
At -35, there will be differences of course.
If you're using conventional, pick either, and there's nothing wrong with the 10w-30. Note that if you think SN/GF-5 5w-30 is ever "too thin" then a 10w-30 in SN/GF-5 is not the solution.
If I thought 5w-30 SN/GF-5 were "too thin," I'd jump a grade, choose a 10w-30 HDEO, or a 5w-30 A3/B4 or E6.
In the manual it says 5w30 is recommended for maximum fuel economy. The pour point for 5w and 10w are both the same -36. They both flow the same it seems to me.
At -35, there will be differences of course.
If I thought 5w-30 SN/GF-5 were "too thin," I'd jump a grade, choose a 10w-30 HDEO, or a 5w-30 A3/B4 or E6.
Maxlife 5W30 or if you insist, Maxlfe 10W30...
Originally Posted By: Garak
If I thought 5w-30 SN/GF-5 were "too thin," I'd jump a grade, choose a 10w-30 HDEO, or a 5w-30 A3/B4 or E6.
Bingo
If I thought 5w-30 SN/GF-5 were "too thin," I'd jump a grade, choose a 10w-30 HDEO, or a 5w-30 A3/B4 or E6.
Bingo
Originally Posted By: boostedtsiawd
.
I can't hear you...
But if your nearly 20 year old Jag made it to over 100K on a steady diet of 5W-30, do you think it's really "too thin?"
Personally I'd use Mobil 1, Maxlife Full Syn, or Pennzoil Platinum high mileage in a 5W-30 bought with rebates, unless you're burning oil and then bump up a grade as needed...
.
I can't hear you...
But if your nearly 20 year old Jag made it to over 100K on a steady diet of 5W-30, do you think it's really "too thin?"
Personally I'd use Mobil 1, Maxlife Full Syn, or Pennzoil Platinum high mileage in a 5W-30 bought with rebates, unless you're burning oil and then bump up a grade as needed...
Well, a period is one way to bump threads..
Both Nickdfresh and Garak have made good points.
Your car has made it this far on 5W30, and if an ILSAC 5W30 isn't thick enough then a ILSAC 10W30 offers better shear stability and lower volatility but it's not necessarily any thicker. Moving up from a ILSAC 30 grade to a HDEO or Euro A3/B3/B4 oil is definitely a thicker 30 grade.
However I do like a good 10W30 and if you have the climate to run it (above 0F or -20C), then it's a good choice.
I've just been looking at the specs for Valvoline Full Synthetic MaxLife 10w30, and it does seem thicker than all the other ILSAC 10W30 oils out there.
https://bobistheoilguy.com/forums/ubbthreads.php/topics/4391322/
Also the two M1 High Mileage (HM) 30 grades, either M1 5W30 HM (HTHS = 3.3) or M1 10W30 HM (HTHS = 3.5,) are thicker 30 grades, so thick they no longer qualify as resource conserving, but they are both top quality products. The M1 10W30 HM is spec'd Euro A3/B3.
I would happily consider any of those three oils.
Your car has made it this far on 5W30, and if an ILSAC 5W30 isn't thick enough then a ILSAC 10W30 offers better shear stability and lower volatility but it's not necessarily any thicker. Moving up from a ILSAC 30 grade to a HDEO or Euro A3/B3/B4 oil is definitely a thicker 30 grade.
However I do like a good 10W30 and if you have the climate to run it (above 0F or -20C), then it's a good choice.
I've just been looking at the specs for Valvoline Full Synthetic MaxLife 10w30, and it does seem thicker than all the other ILSAC 10W30 oils out there.
https://bobistheoilguy.com/forums/ubbthreads.php/topics/4391322/
Also the two M1 High Mileage (HM) 30 grades, either M1 5W30 HM (HTHS = 3.3) or M1 10W30 HM (HTHS = 3.5,) are thicker 30 grades, so thick they no longer qualify as resource conserving, but they are both top quality products. The M1 10W30 HM is spec'd Euro A3/B3.
I would happily consider any of those three oils.
I went with mobil super 5000 10w30 what do you think?
5w30=
API Service Classification SN
Gravity, API 32.9
Specific Gravity 0.8607
Pour Point, °C (°F) -36(-33)
Flash Point, °C (°F), ASTM D 92 221(430)
Viscosity
cSt at 40°C 63.95
cSt at 100°C 10.7
CCS, cP 6,080 @ -30ºC
MRV, cP 26,800 @ -35ºC
Viscosity Index 158
10w30=
API Service Classification SN
Gravity, API 31.3
Specific Gravity 0.8693
Pour Point, °C (°F) -36(-33)
Flash Point, °C (°F), ASTM D 92 230(446)
Viscosity
cSt at 40°C 68.8
cSt at 100°C 10.5
CCS, cP 6,300 @ -25ºC
MRV, cP 17,000 @ -30ºC
Viscosity Index 140
Not much a difference between the 2 dont you think?
5w30=
API Service Classification SN
Gravity, API 32.9
Specific Gravity 0.8607
Pour Point, °C (°F) -36(-33)
Flash Point, °C (°F), ASTM D 92 221(430)
Viscosity
cSt at 40°C 63.95
cSt at 100°C 10.7
CCS, cP 6,080 @ -30ºC
MRV, cP 26,800 @ -35ºC
Viscosity Index 158
10w30=
API Service Classification SN
Gravity, API 31.3
Specific Gravity 0.8693
Pour Point, °C (°F) -36(-33)
Flash Point, °C (°F), ASTM D 92 230(446)
Viscosity
cSt at 40°C 68.8
cSt at 100°C 10.5
CCS, cP 6,300 @ -25ºC
MRV, cP 17,000 @ -30ºC
Viscosity Index 140
Not much a difference between the 2 dont you think?
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