Lubricating oil compositions with improved wear performance and engine cleanliness

A concentrate comprising or resulting from the admixing of:

• from 1 to less than or equal to 50 wt. % of one or more base oils;
• from 1 to 30 wt. %, such as 2 to 20 wt. %, based upon the weight of the concentrate, of one or more of the functionalized polymers of the composition comprising an amide, imide, and/or ester functionalized partially or fully saturated polymer comprising C4-5 olefins having:
• vii) an Mw/Mn of less than 2,
• viii) a Functionality Distribution (Fd) value of 3.5 or less, and
• ix) an Mn of 10,000 g/mol or more (GPC-PS) of the polymer prior to functionalization,
• provided that, if the polymer prior to functionalization is a copolymer of isoprene and butadiene, then the Mn of the copolymer is greater than 25,000 g/mol (GPC-PS);
• from 2 to 20 wt. % of an overbased magnesium based detergent with a Total Base Number (KOH/g) greater than or equal to 9 and less than or equal to 500;
• from 2 to 20 wt. % of an overbased calcium based detergent with a Total Base Number (KOH/g) greater than or equal to 9 and less than or equal to 500;
• and
• from 2 to 40 wt. % of one or more, optionally borated, higher molecular weight polyisobutylene succinimide (PIBSA-PAM) dispersant (Mn 1600 g/mol or more), and/or one or more, optionally borated, lower molecular weight polyisobutylene succinimide (PIBSA-PAM) dispersant (Mn less than 1600 g/mol).

A method of making a lubricating oil composition comprising combining:

• (1) an oil of lubricating viscosity at greater than 50 wt. % of the composition comprising a Group II base oil, a Group III base oil, a Group IV base oil, or combinations thereof,
• (2) a functionalized polymer at from 0.1 to 20 wt. %, of the composition comprising an amide, imide, and/or ester functionalized partially or fully saturated polymer comprising C4-5 olefins having:
• i) an Mw/Mn of less than 2,
• ii) a Functionality Distribution (Fd) value of 3.5 or less, and
• iii) an Mn of 10,000 g/mol or more (GPC-PS) of the polymer prior to functionalization,
• provided that, if the polymer prior to functionalization is a copolymer of isoprene and butadiene, then the Mn of the copolymer is greater than 25,000 g/mol (GPC-PS);
• (3) an overbased calcium based detergent with a Total Base Number (KOH/g) greater than or equal to 9 and less than or equal to 500 and at treat level to deliver at least 500 ppm by weight of calcium to the composition;
• (4) an overbased magnesium based detergent with a Total Base Number (KOH/g) greater than or equal to 9 and less than or equal to 500 and at treat level to deliver at least 200 ppm by weight of magnesium to the composition;
• (5) optionally, one or more, optionally borated, higher molecular weight polyisobutylene succinimide (PIBSA-PAM) dispersant (Mn 1600 g/mol or more), and
• (6) one or more, optionally borated, lower molecular weight polyisobutylene succinimide (PIBSA-PAM) dispersant (Mn less than 1600 g/mol), wherein the treat level of the combination of the higher molecular weight PIBSA-PAM and lower molecular weight PIBSA-PAM is from 1.0 to 6.0 wt. % of the composition, and wherein the treat level of the higher molecular weight PIBSA-PAM is less than or equal to 4.0 wt. % of the composition;
• and
• wherein the lubricating oil composition has a total sulfated ash of less than or equal to 0.9 wt. %, a kinematic viscosity at 100° C. of 5 to 20 cSt, a total phosphorous level of less than or equal to 0.120 wt. %, and a total sulfur level of less than or equal to 0.35 wt. %, and
• wherein the lubricating oil composition provides a Detroit DD-13 scuffing (ASTM D8074-22) test result of at least 31 hours.

A lubricating oil composition comprising or resulting from the admixing of:

• an oil of lubricating viscosity at greater than 50 wt. % of the composition comprising a Group I, Group II base oil, a Group III base oil, a Group IV base oil, or combinations thereof;
• a functionalized polymer at from 0.1 to 20 wt. %, of the composition comprising an amide, imide, and/or ester functionalized partially or fully saturated polymer comprising C4-5 olefins having:
• v) an Mw/Mn of less than 2,
• vi) a Functionality Distribution (Fd) value of 3.5 or less, and
• iii) an Mn of 10,000 g/mol or more (GPC-PS) of the polymer prior to functionalization(GPC-PS);
• an overbased calcium based detergent with a Total Base Number (KOH/g) greater than or equal to 9 and less than or equal to 500 and at treat level to deliver at least 500 ppm by weight of calcium to the composition;
• an overbased magnesium based detergent with a Total Base Number (KOH/g) greater than or equal to 9 and less than or equal to 500 and at treat level to deliver at least 200 ppm by weight of magnesium to the composition;
• one or more, optionally borated, higher molecular weight polyisobutylene succinimide (PIBSA-PAM) dispersant (Mn 1600 g/mol or more), and
• one or more, optionally borated, lower molecular weight polyisobutylene succinimide (PIBSA-PAM) dispersant (Mn less than 1600 g/mol), wherein the treat level of the combination of the higher molecular weight PIBSA-PAM and lower molecular weight PIBSA-PAM is from 1.0 to 6.0 wt. % of the composition, and wherein the treat level of the higher molecular weight PIBSA-PAM is less than or equal to 4.0 wt. % of the composition;
• the lubricating oil composition having a total sulfated ash of less than or equal to 0.9 wt. %, a kinematic viscosity at 100° C. of 5 to 20 cSt, a total phosphorous level of less than or equal to 0.120 wt. %, and a total sulfur level of less than or equal to 0.35 wt. %, and
• wherein the lubricating oil composition provides the following:
• 1) a Detroit DD-13 scuffing (ASTM D8074-22) test result of at least 31 hours, 2) a high temperature high shear viscosity at 150° C. (HTHS) as determined according to ASTM D4683-20 of greater than or equal to 2.6 mPa·s and less than or equal to 3.2 mPa·s or wherein the lubricating oil composition has a HTHS of greater than or equal to 3.5 mPa·s, 3) a turbocharger #1 deposit rating of greater than or equal to 50 and a piston cleanliness rating of greater than or equal to 74 in the Daimler OM471 engine test (CEC L-118-21), 4) an oxidation induction time of greater than or equal to 65 minutes in the pressure differential scanning calorimetry (PDSC) oxidative stability test (CEC L-85_T-99), and 5) when the lubricating oil composition has a kinematic viscosity at 100° C. of 9 to 20 cSt results in a rocker arm mass loss of less than or equal to 100 mg in the Ford 6.7 L valve train wear test.

A lubricating oil composition comprising or resulting from the admixing of:

• an oil of lubricating viscosity at greater than 50 wt. % of the composition comprising a Group I, Group II base oil, a Group III base oil, a Group IV base oil, or combinations thereof;
• a functionalized polymer at from 0.1 to 20 wt. %, of the composition comprising an amide, imide, and/or ester functionalized partially or fully saturated polymer comprising C4-5 olefins having:
• iii) an Mw/Mn of less than 2,
• iv) a Functionality Distribution (Fd) value of 3.5 or less, and
• iii) an Mn of 10,000 g/mol or more (GPC-PS) of the polymer prior to functionalization,
• provided that, if the polymer prior to functionalization is a copolymer of isoprene and butadiene, then the Mn of the copolymer is greater than 25,000 g/mol (GPC-PS);
• an overbased calcium based detergent with a Total Base Number (KOH/g) greater than or equal to 9 and less than or equal to 500 and at treat level to deliver at least 500 ppm by weight of calcium to the composition;
• an overbased magnesium based detergent with a Total Base Number (KOH/g) greater than or equal to 9 and less than or equal to 500 and at treat level to deliver at least 200 ppm by weight of magnesium to the composition;
• optionally, one or more, optionally borated, higher molecular weight polyisobutylene succinimide (PIBSA-PAM) dispersant (Mn 1600 g/mol or more), and
• one or more, optionally borated, lower molecular weight polyisobutylene succinimide (PIBSA-PAM) dispersant (Mn less than 1600 g/mol), wherein the treat level of the combination of the higher molecular weight PIBSA-PAM and lower molecular weight PIBSA-PAM is from 1.0 to 6.0 wt. % of the composition, and wherein the treat level of the higher molecular weight PIBSA-PAM is from 0 to 4.0 wt. % of the composition;
• the lubricating oil composition having a total sulfated ash of less than or equal to 0.9 wt. %, a kinematic viscosity at 100° C. of 5 to 20 cSt, a total phosphorous level of less than or equal to 0.120 wt. %, and a total sulfur level of less than or equal to 0.35 wt. %, and
• wherein the lubricating oil composition provides a Detroit DD-13 scuffing (ASTM D8074-22) test result of at least 31 hours.