PC-12 Survey: Readiness Advances, but OEM Guidance and Cutover Questions Remain

Early responses show uneven preparation, selective expectations for FB-4 and a call for more coordinated transitions.

JobbersWorld | Preliminary survey analysis | October 6, 2026

Nearly six in ten respondents to JobbersWorld’s PC-12 Readiness Survey say their organizations are fully or mostly prepared for the transition. But readiness is not uniform, and the leading unresolved issue is not product formulation. It is OEM guidance and approvals.

A preliminary analysis of 61 responses included in JobbersWorld’s October 6 morning data pull finds that supplier communication is well underway, most respondents expect something less than significant changes to the heavy-duty engine oil products they handle, and expectations for FB-4 remain largely selective or application-specific. At the same time, more than four in ten report either a supplier transition expected after January 1 or plans that are not yet firm.

The findings offer an early view of how respondents are approaching the January 1, 2027 first licensing of API CL-4 and FB-4. They should be read as a snapshot of participating businesses—not as a representative measure of the entire lubricant industry.

Readiness is advancing, but unevenly

Of the 61 respondents, 15 describe their organizations as fully prepared and 21 as mostly prepared. Together, they account for 59.0% of the responses. Another 12 report some preparation underway, nine report little preparation underway, and four are not sure.

The response mix is concentrated in the distribution channel, with distributors accounting for the majority of respondents. Blenders/manufacturers and marketers/brand owners are also represented, while no retailers or end users/fleet operators are represented in the current response base.

The preliminary results suggest that readiness is not progressing uniformly across the market. JobbersWorld|PRO will examine differences across respondent groups and the factors associated with preparedness in the full analysis.

Supplier plans are visible; cutover dates are less uniform

In total, 82.0% select one of the three affirmative answers about supplier transition plans. However, those answers describe different stages and schedules.

Base: 61 responses. Answer wording is abbreviated. Percentages may not total 100% because of rounding.

The first two groups total 34 respondents, or 55.7%. The other 27, or 44.3%, report a later transition or plans that are not yet firm. This points to a potentially staggered commercial rollout rather than a single, synchronized cutover.

Importantly, reporting that a product is already formulated to meet the new requirements is not the same as reporting that it is already API-licensed under the new categories. January 1, 2027 is the first licensing date, not evidence that every supplier must complete its commercial transition on that day.

For distributors, the practical questions extend beyond formulation readiness: which products will change, when replacement inventory will arrive, how existing inventory will be managed, and what customers should be told.

Most expect less than significant product changes

Only four of the 60 respondents answering the product-change question select “Significant changes,” or 6.7%. The largest group expects moderate changes: 23 respondents, or 38.3%. Another 20 expect minor changes, nine expect little or no change, and four say it is too early to tell.

Taken together, moderate, minor, and little-or-no-change responses account for 86.7% of answers. The early results therefore do not suggest that most participating businesses expect a dramatic change to the HDEO products they sell, distribute, manufacture, or use.

That does not mean the transition will be operationally simple. The question asks about expected product changes; it does not measure qualification costs, inventory exposure, approval delays, or the work required to support customers through the cutover.

FB-4 expectations remain selective

The preliminary FB-4 results point toward targeted applications rather than broad market demand.

Only two of 61 respondents, or 3.3%, say they expect meaningful FB-4 demand or use. By comparison, 68.9% expect demand to be either limited/selective or concentrated in specific applications.

This is a measure of current expectations, not a sales forecast or an estimate of FB-4’s eventual market share. Respondents were not asked to quantify volumes, and no fleet/end-user respondents are represented in the current response base.

Even with those limitations, the findings suggest that application fit, OEM direction and customer-specific requirements will be central to early FB-4 positioning.

OEM guidance leads the unresolved issues

Among 60 respondents answering the question about their biggest unresolved issue, OEM guidance and approvals ranks first, selected by 21 respondents, or 35.0%.

Other concerns include inventory and cutover planning, customer communication, CL-4 versus FB-4 positioning, product and formulation changes, and off-highway applications.

The results suggest that the transition is as much a commercial and application-guidance challenge as a product-development exercise. Respondents need to understand where products fit, which approvals matter, and how to move from existing inventory to the new offering without confusing customers.

Open-ended comments also point to questions involving older-fleet applicability and backward compatibility, future viscosity grades, product availability, base-oil flexibility and additive chemistry limits.

Direct feedback raises similar questions

Separate feedback sent directly to JobbersWorld in connection with the survey points to several of the same issues reflected in the preliminary results.

One industry participant questioned the applicability of the new oils to older mining, construction and agricultural equipment, particularly where operators have raised questions about phosphorus levels and want greater clarity on testing and backward compatibility in off-highway applications. The question underscores the importance of equipment-specific OEM guidance, particularly for older equipment and applications outside the primary on-highway focus of the specification.

Another questioned why OEM specifications calling for FB-4 oils have not yet become more visible and whether PC-12 will result in significant performance or viscosity changes beyond the introduction of lower-viscosity options. The question is consistent with the survey finding that respondents currently expect FB-4 demand to be selective rather than broad.

A third asked what specific engine-hardware and emissions-system changes are driving the new PC-12 requirements, saying those changes remain unclear from the perspective of the market.

These comments are not part of the survey response totals, but they provide additional context for the concerns reflected in the results—particularly the need for clearer OEM guidance on applications, approvals, backward compatibility and the rationale for the new categories.

Are these the questions your organization is dealing with—or are different issues emerging? The JobbersWorld PC-12 Readiness Survey remains open, and additional industry perspectives are encouraged.

Looking beyond PC-12

The survey also asks what would most help address current challenges and make future specification transitions and supply disruptions easier to manage.

The strongest preliminary response is a call for better coordination among OEMs, API and industry for more predictable and manageable transitions. Greater flexibility from OEMs in product approvals and transition requirements also ranks prominently.

Together, those responses point toward a desire for a more predictable transition process.

JobbersWorld|PRO will examine these responses in greater detail, including how priorities vary among respondents and what they may indicate for future specification changes and supply disruptions.

The preliminary takeaway

PC-12 preparation is moving forward among participating businesses, but the early results do not describe a uniformly ready or synchronized market.

Many respondents have visibility into supplier plans and expect manageable product changes, while important questions remain about OEM direction, application suitability, approval status, backward compatibility, inventory cutover and customer communication.

For lubricant distributors and marketers, the immediate priority appears to be turning technical readiness into a clear commercial plan.

For FB-4, the early emphasis is on targeted use rather than broad demand.

These are preliminary signals. Additional responses will help determine how widely the findings apply, identify where views differ across the supply chain, and show whether the readiness gap narrows as first licensing approaches.