The new SP oils have high phosphorus.The Phosphorus level looks abnormally high.
Did API remove caps on the P/Zn for SP?The new SP oils have high phosphorus.
I’m not sure what limits are allowed but this is one of multiple SP samples that show elevated phos and zinc.Did API remove caps on the P/Zn for SP?
Or is this a lab calibration issue?
I agree 100%Great oil and a great price , defiantly a fan of Chevron products.
I’m not sure what limits are allowed but this is one of multiple SP samples that show elevated phos and zinc.
I faintly recall an old post on this forum about labs having calibration issues, and P/ZN being the two elements where it is often an issue. I could be mistaken though.From the latest edition of API 1509, page 75, under SP:
ASTM D4951 or D5185, phosphorus % mass, maxf 0.08g NR 0.08g
ASTM D4951 or D5185, phosphorus % mass, minf 0.06g NR 0.06g