Valvoline SynPower MST C3 vs SynPower XL-III

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Hi everyone, I got an oilchange in my two BMW's coming up. One is a non DPF BMW X5 3.0 Diesel, the other is a BMW 750i biturbo. After looking through what is available here in Poland, I decided on Valvoline 5W30 full synthetic. Problem is...which one? They seem the same to me, please help smile Valvoline SynPower™Xtreme MST C3 Motor Oil SAE 5W-30 SAE Viscosity Grade 5W-30 Viscosity, mm2 /s @ 100 ºC. ASTM D-445 12.0 Viscosity, mm2 /s @ 40 ºC. ASTM D-445 70.9 Viscosity Index ASTM D-2270 167 Viscosity, mPa.s –30ºC. ASTM D-5293 <6600 TBN, mg KOH/g ASTM D-2896 7.6 Pour Point, ºC ASTM D-5950 -42 Specific Gravity @ 15.6°C. ASTM D-4052 0.852 Flash Point, COC, ºC. ASTM D-92 208 API: SN/CF ACEA: C3-10 Suitable for use in engines where ACEA: A3/B4 is recommended* BMW LL-04 MB 229.51 VW 502.00 / 505.00 Meets requirements of GM Dexos 2 Valvoline SynPower™Xtreme XL-III C3 motor oil SAE 5W-30 SAE Viscosity Grade 5W-30 Viscosity, mm2 /s @ 100 ºC. ASTM D-445 11.8 Viscosity, mm2 /s @ 40 ºC. ASTM D-445 68 Viscosity Index ASTM D-2270 170 Viscosity, mPa.s –30ºC. ASTM D-5293 <6600 TBN, mg KOH/g ASTM D-2896 6.6 Pour Point, ºC ASTM D-5950 -42 Specific Gravity @ 15.6°C. ASTM D-4052 0.853 Flash Point, COC, ºC. ASTM D-92 230 ACEA C3-10 Suitable for use in engines where ACEA A3/B4 is recommended *** Meets all engine protection requirements of ACEA C2 BMW Longlife-04 MB-229.51** Porsche C30 Approved under VW Standard 504.00 / 507.00*
 
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Both are LL-04 so for a BMW requiring LL-04 you can use either. MST is probably the "go to" std recommendation for LL-04 and maybe a little cheaper. XL-III is more intended for VW as it carries VW507.
 
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Starting TBN is one thing, but then there is the rate of TBN depletion. Depending on the underlying additive chemistry, the TBN in that XL-III oil might deplete more slowly than MST C3. Nemesis, how often are you planning to change oil in these two vehicles? Witaj na forum. Pozdrawiam!
 
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The XL-III is the low-SAPS VW 504/507 product. There's no reason to use this oil if you don't have a vehicle that specifies it. The first product listed - Xtreme MST C3 would be my choice of these two. My car does require the XL-III but Valvoline doesn't sell it in the USA in quantities smaller than 55 gallon drums. I'd love to buy a drum but,,, whew that would be overkill. smile
 
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